diff --git a/src/Controls/samples/Controls.Sample.Sandbox/Maui.Controls.Sample.Sandbox.csproj b/src/Controls/samples/Controls.Sample.Sandbox/Maui.Controls.Sample.Sandbox.csproj
index 068c3186c744..c4f91853f212 100644
--- a/src/Controls/samples/Controls.Sample.Sandbox/Maui.Controls.Sample.Sandbox.csproj
+++ b/src/Controls/samples/Controls.Sample.Sandbox/Maui.Controls.Sample.Sandbox.csproj
@@ -13,6 +13,9 @@
     <!-- Disable multi-RID builds to workaround a parallel build issue -->
     <RuntimeIdentifier Condition="$(TargetFramework.Contains('-maccatalyst'))">maccatalyst-x64</RuntimeIdentifier>
     <RuntimeIdentifier Condition="$(TargetFramework.Contains('-maccatalyst')) and '$([System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture)' == 'arm64'">maccatalyst-arm64</RuntimeIdentifier>
+    <!-- NOTE: By default the UseMaterial3 flag value is false. If you change the UseMaterial3 flag, you MUST delete the artifacts folder 
+       and rebuild the entire codebase using: dotnet build ./Microsoft.Maui.BuildTasks.slnf -->
+    <UseMaterial3>false</UseMaterial3>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/Controls/samples/Controls.Sample/Maui.Controls.Sample.csproj b/src/Controls/samples/Controls.Sample/Maui.Controls.Sample.csproj
index e4d7504610b0..bb37513157c2 100644
--- a/src/Controls/samples/Controls.Sample/Maui.Controls.Sample.csproj
+++ b/src/Controls/samples/Controls.Sample/Maui.Controls.Sample.csproj
@@ -15,6 +15,9 @@
     <!-- Disable multi-RID builds to workaround a parallel build issue -->
     <RuntimeIdentifier Condition="$(TargetFramework.Contains('-maccatalyst'))">maccatalyst-x64</RuntimeIdentifier>
     <RuntimeIdentifier Condition="$(TargetFramework.Contains('-maccatalyst')) and '$([System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture)' == 'arm64'">maccatalyst-arm64</RuntimeIdentifier>
+    <!-- NOTE: By default the UseMaterial3 flag value is false. If you change the UseMaterial3 flag, you MUST delete the artifacts folder 
+       and rebuild the entire codebase using: dotnet build ./Microsoft.Maui.BuildTasks.slnf -->
+    <UseMaterial3>false</UseMaterial3>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj b/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj
index 28d24283507a..8724cf061f92 100644
--- a/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj
+++ b/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj
@@ -13,6 +13,9 @@
     <RuntimeIdentifiers Condition="$(TargetFramework.Contains('-maccatalyst')) and '$([System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture)' == 'arm64'">maccatalyst-x64;maccatalyst-arm64</RuntimeIdentifiers>
     <ExcludeMicrosoftNetTestSdk>true</ExcludeMicrosoftNetTestSdk>
     <MauiEnableXamlCBindingWithSourceCompilation>true</MauiEnableXamlCBindingWithSourceCompilation>
+  <!-- NOTE: By default the UseMaterial3 flag value is false. If you change the UseMaterial3 flag, you MUST delete the artifacts folder 
+       and rebuild the entire codebase using: dotnet build ./Microsoft.Maui.BuildTasks.slnf -->
+    <UseMaterial3>false</UseMaterial3>
   </PropertyGroup>
 
   <PropertyGroup>