diff --git a/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceGenerator.cs b/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceGenerator.cs
index 79fb7e1982ba9f..9841c86e869a43 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceGenerator.cs
+++ b/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceGenerator.cs
@@ -389,6 +389,22 @@ private static IncrementalMethodStubGenerationContext CalculateStubInformation(M
 
             var virtualMethodIndexData = new VirtualMethodIndexData(index, ImplicitThisParameter: true, direction, true, ExceptionMarshalling.Com);
 
+            MarshallingInfo exceptionMarshallingInfo;
+
+            if (generatedComInterfaceAttributeData.ExceptionToUnmanagedMarshaller is not null)
+            {
+                exceptionMarshallingInfo = CustomMarshallingInfoHelper.CreateNativeMarshallingInfoForNonSignatureElement(
+                    environment.Compilation.GetTypeByMetadataName(TypeNames.System_Exception),
+                    generatedComInterfaceAttributeData.ExceptionToUnmanagedMarshaller,
+                    generatedComAttribute,
+                    environment.Compilation,
+                    generatorDiagnostics);
+            }
+            else
+            {
+                exceptionMarshallingInfo = new ComExceptionMarshalling();
+            }
+
             return new IncrementalMethodStubGenerationContext(
                 signatureContext,
                 containingSyntaxContext,
@@ -396,7 +412,7 @@ private static IncrementalMethodStubGenerationContext CalculateStubInformation(M
                 locations,
                 callConv.ToSequenceEqualImmutableArray(SyntaxEquivalentComparer.Instance),
                 virtualMethodIndexData,
-                new ComExceptionMarshalling(),
+                exceptionMarshallingInfo,
                 environment.EnvironmentFlags,
                 owningInterface,
                 declaringType,
diff --git a/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceInfo.cs b/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceInfo.cs
index 9829c914cb11fa..1aa502aec58a33 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceInfo.cs
+++ b/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/ComInterfaceInfo.cs
@@ -94,6 +94,9 @@ public static DiagnosticOrInterfaceInfo From(INamedTypeSymbol symbol, InterfaceD
             if (!OptionsAreValid(symbol, syntax, interfaceAttributeData, baseAttributeData, out DiagnosticInfo? optionsDiagnostic))
                 return DiagnosticOrInterfaceInfo.From(optionsDiagnostic);
 
+            if (!ExceptionToUnmanagedMarshallerIsValid(syntax, interfaceAttributeData, out DiagnosticInfo? exceptionToUnmanagedMarshallerDiagnostic))
+                return DiagnosticOrInterfaceInfo.From(exceptionToUnmanagedMarshallerDiagnostic);
+
             InterfaceInfo info = (
                 new ComInterfaceInfo(
                     ManagedTypeInfo.CreateTypeInfoForTypeSymbol(symbol),
@@ -285,6 +288,27 @@ private static bool OptionsAreValid(
             return true;
         }
 
+        private static bool ExceptionToUnmanagedMarshallerIsValid(
+            InterfaceDeclarationSyntax syntax,
+            GeneratedComInterfaceCompilationData attrSymbolInfo,
+            [NotNullWhen(false)] out DiagnosticInfo? exceptionToUnmanagedMarshallerDiagnostic)
+        {
+            if (attrSymbolInfo.ExceptionToUnmanagedMarshaller is INamedTypeSymbol exceptionToUnmanagedMarshallerType)
+            {
+                if (!exceptionToUnmanagedMarshallerType.IsAccessibleFromFileScopedClass(out var details))
+                {
+                    exceptionToUnmanagedMarshallerDiagnostic = DiagnosticInfo.Create(
+                        GeneratorDiagnostics.ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode,
+                        syntax.Identifier.GetLocation(),
+                        exceptionToUnmanagedMarshallerType.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat).Replace(TypeNames.GlobalAlias, ""),
+                        details);
+                    return false;
+                }
+            }
+            exceptionToUnmanagedMarshallerDiagnostic = null;
+            return true;
+        }
+
         /// <summary>
         /// Returns true if there is 0 or 1 base Com interfaces (i.e. the inheritance is valid), and returns false when there are 2 or more base Com interfaces and sets <paramref name="diagnostic"/>.
         /// </summary>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/GeneratedComInterfaceAttributeData.cs b/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/GeneratedComInterfaceAttributeData.cs
index b062e249759d07..69ae9bcefd3b04 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/GeneratedComInterfaceAttributeData.cs
+++ b/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/GeneratedComInterfaceAttributeData.cs
@@ -35,6 +35,7 @@ public static GeneratedComInterfaceData From(GeneratedComInterfaceCompilationDat
     internal sealed record GeneratedComInterfaceCompilationData : InteropAttributeCompilationData
     {
         public ComInterfaceOptions Options { get; init; } = ComInterfaceOptions.ManagedObjectWrapper | ComInterfaceOptions.ComObjectWrapper;
+        public INamedTypeSymbol? ExceptionToUnmanagedMarshaller { get; init; }
 
         public static bool TryGetGeneratedComInterfaceAttributeFromInterface(INamedTypeSymbol interfaceSymbol, [NotNullWhen(true)] out AttributeData? generatedComInterfaceAttribute)
         {
@@ -70,6 +71,17 @@ public static GeneratedComInterfaceCompilationData GetDataFromAttribute(Attribut
                     Options = (ComInterfaceOptions)options.Value
                 };
             }
+            if (args.TryGetValue(nameof(ExceptionToUnmanagedMarshaller), out TypedConstant exceptionToUnmanagedMarshaller))
+            {
+                if (exceptionToUnmanagedMarshaller.Value is not INamedTypeSymbol)
+                {
+                    return null;
+                }
+                generatedComInterfaceAttributeData = generatedComInterfaceAttributeData with
+                {
+                    ExceptionToUnmanagedMarshaller = (INamedTypeSymbol)exceptionToUnmanagedMarshaller.Value
+                };
+            }
             return generatedComInterfaceAttributeData;
         }
     }
diff --git a/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/GeneratorDiagnostics.cs b/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/GeneratorDiagnostics.cs
index ca51e30346035a..e260ef98ec06df 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/GeneratorDiagnostics.cs
+++ b/src/libraries/System.Runtime.InteropServices/gen/ComInterfaceGenerator/GeneratorDiagnostics.cs
@@ -141,6 +141,15 @@ public class Ids
             DiagnosticSeverity.Error,
             isEnabledByDefault: true);
 
+        public static readonly DiagnosticDescriptor ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode =
+            DiagnosticDescriptorHelper.Create(
+            Ids.InvalidGeneratedComInterfaceAttributeUsage,
+            GetResourceString(nameof(SR.InvalidGeneratedComInterfaceAttributeUsageTitle)),
+            GetResourceString(nameof(SR.ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode)),
+            Category,
+            DiagnosticSeverity.Error,
+            isEnabledByDefault: true);
+
         /// <inheritdoc cref="SR.InvalidExceptionMarshallingConfigurationMessage"/>
         public static readonly DiagnosticDescriptor InvalidExceptionMarshallingConfiguration =
             DiagnosticDescriptorHelper.Create(
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/Strings.resx b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/Strings.resx
index 7253540e16a0df..83735f19bded22 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/Strings.resx
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/Strings.resx
@@ -916,4 +916,7 @@
   <data name="BaseInterfaceDefinedInOtherAssemblyTitle" xml:space="preserve">
     <value>Specifying 'GeneratedComInterfaceAttribute' on an interface that has a base interface defined in another assembly is not supported</value>
   </data>
+  <data name="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode" xml:space="preserve">
+    <value>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.cs.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.cs.xlf
index ba1c9a3a785dba..baefd6dd66bd79 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.cs.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.cs.xlf
@@ -392,6 +392,11 @@
         <target state="translated">Zařazovací typ vstupního bodu {0} pro typ {1} musí být typ s nejméně jedním atributem System.Runtime.InteropServices.CustomMarshallerAttribute, který tento typ určuje jako spravovaný typ.</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">Informace o zařazování se určily pro ElementIndirectionDepth {0}, ale informace o zařazování byly potřebné pouze pro {1} úrovně indirekce.</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.de.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.de.xlf
index b8b529c7c12b71..c14f2ce126bb82 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.de.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.de.xlf
@@ -392,6 +392,11 @@
         <target state="translated">Der Marshallertyp "{0}" des Eintrittspunkts für den Typ "{1}" muss ein Typ mit mindestens einem "System.Runtime.InteropServices.CustomMarshallerAttribute" sein, der diesen Typ als verwalteten Typ angibt</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">Marshallinginformationen wurden für \"ElementIndirectionDepth\" {0}angegeben. Marshallinginformationen wurden jedoch nur für {1} Dereferenzierungsebene(n) benötigt.</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.es.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.es.xlf
index 89886b7f025883..52c7c6e7c2aa77 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.es.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.es.xlf
@@ -392,6 +392,11 @@
         <target state="translated">El tipo de serializador de punto de entrada "{0}" para el tipo "{1}" debe ser un tipo con al menos un "System.Runtime.InteropServices.CustomMarshallerAttribute" que especifique este tipo como el tipo administrado</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">Se especificó información de serialización para “ElementIndirectionDepth” {0}, pero la información de serialización solo era necesaria para {1} niveles de direccionamiento indirecto</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.fr.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.fr.xlf
index 34309a0a8dc920..0a4ca5001abda2 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.fr.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.fr.xlf
@@ -392,6 +392,11 @@
         <target state="translated">Le type de marshaleur de point d’entrée « {0} » pour le type « {1} » doit être un type avec au moins un type « System.Runtime.InteropServices.CustomMarspiaerAttribute » qui spécifie ce type comme type managé</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">Des informations de marshaling ont été spécifiées pour « ElementIndirectionDepth » {0}, mais les informations de marshaling étaient uniquement nécessaires pour {1} niveau(s) d’indirection</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.it.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.it.xlf
index 598b0874ab7f25..e84ca09f0b32c5 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.it.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.it.xlf
@@ -392,6 +392,11 @@
         <target state="translated">Il tipo di marshaller del punto di ingresso '{0}' per il tipo '{1}' deve essere un tipo con almeno un elemento 'System.Runtime.InteropServices.CustomMarshallerAttribute' che specifica questo tipo come tipo gestito</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">Sono state specificate informazioni di marshalling per l'elemento 'ElementIndirectionDepth' {0}, ma le informazioni di marshalling sono necessarie solo per {1} livello/i di riferimento indiretto</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ja.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ja.xlf
index e0c3c159f39952..4ef640080a7209 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ja.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ja.xlf
@@ -392,6 +392,11 @@
         <target state="translated">型 '{1}' 向けのエントリ ポイント マーシャラー型 '{0}' は、この型をマネージド型として指定する 'System.Runtime.InteropServices.CustomMarshallerAttribute' を 1 つ以上持つ型である必要があります</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">'ElementIndirectionDepth' {0} にマーシャリング情報が指定されましたが、マーシャリング情報は間接参照の {1} レベルにのみ必要です</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ko.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ko.xlf
index 3544bea85669bd..24405cdb59aac8 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ko.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ko.xlf
@@ -392,6 +392,11 @@
         <target state="translated">'{1}' 유형의 진입점 마샬러 유형 '{0}'은(는) 이 유형을 관리 유형으로 지정하는 'System.Runtime.InteropServices.CustomMarshallerAttribute'가 하나 이상 있는 유형이어야 합니다.</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">마샬링 정보가 'ElementIndirectionDepth' {0}에 대해 지정되었지만 마샬링 정보는 간접 참조 수준 {1}에만 필요했습니다.</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.pl.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.pl.xlf
index 30bc2cef8ae4de..d253359ff888af 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.pl.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.pl.xlf
@@ -392,6 +392,11 @@
         <target state="translated">Typ marshallera punktu wejścia „{0}” dla typu „{1}” musi być typem z co najmniej jednym atrybutem „System.Runtime.InteropServices.CustomMarshaellerAttribute”, który określa ten typ jako typ zarządzany</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">Informacje dotyczące skierowania zostały określone dla elementu „ElementIndirectionDepth” {0}, ale informacje dotyczące skierowania były potrzebne tylko dla poziomów pośrednich w liczbie {1}</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.pt-BR.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.pt-BR.xlf
index 3b825512d46ceb..ad2508b1e6fa8d 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.pt-BR.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.pt-BR.xlf
@@ -392,6 +392,11 @@
         <target state="translated">O tipo de empacotador de ponto de entrada '{0}' para o tipo '{1}' deve ser um tipo com pelo menos um 'System.Runtime.InteropServices.CustomMarshallerAttribute' que especifica esse tipo como o tipo gerenciado</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">As informações de marshalling foram especificadas para o {0} 'ElementIndirectionDepth', mas as informações de marshalling só eram necessárias para {1} nível(s) de indireção</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ru.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ru.xlf
index 27d7f597d2202c..790c09bac83a32 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ru.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.ru.xlf
@@ -392,6 +392,11 @@
         <target state="translated">Тип маршалера точки входа "{0}" для типа "{1}" должен содержать хотя бы один атрибут "System.Runtime.InteropServices.CustomMarshallerAttribute", указывающий этот тип в качестве управляемого типа</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">Для \"ElementIndirectionDepth\" {0} указаны сведения маршализации, но они необходимы только для {1} уровней косвенного обращения</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.tr.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.tr.xlf
index 72813018d87503..b7a6c35d02677a 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.tr.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.tr.xlf
@@ -392,6 +392,11 @@
         <target state="translated">Tür '{1}' için giriş noktası hazırlayıcı türü '{0}', bu türü yönetilen tür olarak belirten en az bir 'System.Runtime.InteropServices.CustomMarshallerAttribute' türü olmalıdır</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">'ElementIndirectionDepth' {0} için sıralama bilgileri belirtildi, ancak sıralama bilgileri yalnızca {1} yöneltme düzeyi için gerekli</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.zh-Hans.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.zh-Hans.xlf
index b9e21c430f3a76..7dd28559a7dccc 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.zh-Hans.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.zh-Hans.xlf
@@ -392,6 +392,11 @@
         <target state="translated">适用于类型“{1}”的入口点封送处理程序类型“{0}”必须是至少具有一个指定此类型为托管类型的 “System.Runtime.InteropServices.CustomMarshallerAttribute”的类型</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">为 “ElementIndirectionDepth” {0} 指定了封送信息，但只有间接的 {1} 级别需要封送信息</target>
diff --git a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.zh-Hant.xlf b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.zh-Hant.xlf
index feb774294e8ea0..f422c201a2a497 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.zh-Hant.xlf
+++ b/src/libraries/System.Runtime.InteropServices/gen/Common/Resources/xlf/Strings.zh-Hant.xlf
@@ -392,6 +392,11 @@
         <target state="translated">類型 '{1}' 的進入點封送處理器類型 '{0}' 必須是具有至少一個 'System.Runtime.InteropServices.CustomMarshallerAttribute' 的類型，指定此類型為受控類型</target>
         <note />
       </trans-unit>
+      <trans-unit id="ExceptionToUnmanagedMarshallerNotAccessibleByGeneratedCode">
+        <source>The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</source>
+        <target state="new">The type '{0}' specified as 'GeneratedComInterfaceAttribute.ExceptionToUnmanagedMarshaller' is not accessible by generated code. The type must have at least 'internal' accessibility. {1}</target>
+        <note />
+      </trans-unit>
       <trans-unit id="ExtraneousMarshallingInfo">
         <source>Marshalling info was specified for 'ElementIndirectionDepth' {0}, but marshalling info was only needed for {1} level(s) of indirection</source>
         <target state="translated">已為 'ElementIndirectionDepth' {0}指定封送處理資訊，但只有 {1}層級 (間接) 需要封送處理資訊</target>
diff --git a/src/libraries/System.Runtime.InteropServices/ref/System.Runtime.InteropServices.cs b/src/libraries/System.Runtime.InteropServices/ref/System.Runtime.InteropServices.cs
index eb2130e4f80bc8..d262bcb20fa3ec 100644
--- a/src/libraries/System.Runtime.InteropServices/ref/System.Runtime.InteropServices.cs
+++ b/src/libraries/System.Runtime.InteropServices/ref/System.Runtime.InteropServices.cs
@@ -394,6 +394,7 @@ public GeneratedComInterfaceAttribute() { }
         public System.Runtime.InteropServices.Marshalling.ComInterfaceOptions Options { get { throw null; } set { } }
         public System.Runtime.InteropServices.StringMarshalling StringMarshalling { get { throw null; } set { } }
         public System.Type? StringMarshallingCustomType { get { throw null; } set { } }
+        public System.Type? ExceptionToUnmanagedMarshaller { get { throw null; } set { } }
     }
     [System.CLSCompliantAttribute(false)]
     public partial interface IComExposedClass
diff --git a/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/Marshalling/GeneratedComInterfaceAttribute.cs b/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/Marshalling/GeneratedComInterfaceAttribute.cs
index 60bc272d09284d..917af533139a8d 100644
--- a/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/Marshalling/GeneratedComInterfaceAttribute.cs
+++ b/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/Marshalling/GeneratedComInterfaceAttribute.cs
@@ -38,5 +38,13 @@ public class GeneratedComInterfaceAttribute : Attribute
         /// or must be set to <see cref="StringMarshalling.Custom" />.
         /// </remarks>
         public Type? StringMarshallingCustomType { get; set; }
+
+        /// <summary>
+        /// Gets or sets the <see cref="Type"/> used to control how exceptions are marshalled for all methods on the interface.
+        /// </summary>
+        /// <remarks>
+        /// If this field is not specified, <see cref="ExceptionAsHResultMarshaller{T}"/> is used to marshal exceptions.
+        /// </remarks>
+        public Type? ExceptionToUnmanagedMarshaller { get; set; }
     }
 }