diff --git a/src/cascadia/TerminalSettingsEditor/LaunchViewModel.cpp b/src/cascadia/TerminalSettingsEditor/LaunchViewModel.cpp
index dc863292c6a..f1d61bce7fd 100644
--- a/src/cascadia/TerminalSettingsEditor/LaunchViewModel.cpp
+++ b/src/cascadia/TerminalSettingsEditor/LaunchViewModel.cpp
@@ -332,7 +332,7 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         // from menus, but still work as the startup profile for instance.
         for (const auto& profile : allProfiles)
         {
-            if (!profile.Deleted())
+            if (!profile.Deleted() && !profile.Orphaned() /* BACKPORT GH#18188 - DO NOT DISPLAY ORPHANED PROFILES */)
             {
                 profiles.emplace_back(profile);
             }
diff --git a/src/cascadia/TerminalSettingsEditor/MainPage.cpp b/src/cascadia/TerminalSettingsEditor/MainPage.cpp
index 6ffe49eb595..779c2d5fc7d 100644
--- a/src/cascadia/TerminalSettingsEditor/MainPage.cpp
+++ b/src/cascadia/TerminalSettingsEditor/MainPage.cpp
@@ -525,7 +525,7 @@ namespace winrt::Microsoft::Terminal::Settings::Editor::implementation
         // profile changes.
         for (const auto& profile : _settingsClone.AllProfiles())
         {
-            if (!profile.Deleted())
+            if (!profile.Deleted() && !profile.Orphaned() /* BACKPORT GH#18188 - DO NOT DISPLAY ORPHANED PROFILES */)
             {
                 auto profileVM = _viewModelForProfile(profile, _settingsClone);
                 profileVM.SetupAppearances(_colorSchemesPageVM.AllColorSchemes());
diff --git a/src/cascadia/TerminalSettingsModel/CascadiaSettings.cpp b/src/cascadia/TerminalSettingsModel/CascadiaSettings.cpp
index 8d2ba573102..5c075bf27d1 100644
--- a/src/cascadia/TerminalSettingsModel/CascadiaSettings.cpp
+++ b/src/cascadia/TerminalSettingsModel/CascadiaSettings.cpp
@@ -103,7 +103,7 @@ Model::CascadiaSettings CascadiaSettings::Copy() const
             for (const auto& profile : targetProfiles)
             {
                 allProfiles.emplace_back(*profile);
-                if (!profile->Hidden())
+                if (!profile->Hidden() && !profile->Orphaned())
                 {
                     activeProfiles.emplace_back(*profile);
                 }
diff --git a/src/cascadia/TerminalSettingsModel/CascadiaSettingsSerialization.cpp b/src/cascadia/TerminalSettingsModel/CascadiaSettingsSerialization.cpp
index e988cb5dbda..10029ece3f4 100644
--- a/src/cascadia/TerminalSettingsModel/CascadiaSettingsSerialization.cpp
+++ b/src/cascadia/TerminalSettingsModel/CascadiaSettingsSerialization.cpp
@@ -1208,12 +1208,12 @@ CascadiaSettings::CascadiaSettings(SettingsLoader&& loader) :
             const auto& parents = profile->Parents();
             if (std::none_of(parents.begin(), parents.end(), [&](const auto& parent) { return parent->Source() == source; }))
             {
-                continue;
+                profile->Orphaned(true);
             }
         }
 
         allProfiles.emplace_back(*profile);
-        if (!profile->Hidden())
+        if (!profile->Hidden() && !profile->Orphaned())
         {
             activeProfiles.emplace_back(*profile);
         }
diff --git a/src/cascadia/TerminalSettingsModel/Profile.cpp b/src/cascadia/TerminalSettingsModel/Profile.cpp
index 66382c857b1..0937c1a0441 100644
--- a/src/cascadia/TerminalSettingsModel/Profile.cpp
+++ b/src/cascadia/TerminalSettingsModel/Profile.cpp
@@ -103,6 +103,7 @@ winrt::com_ptr<Profile> Profile::CopySettings() const
     const auto defaultAppearance = AppearanceConfig::CopyAppearance(winrt::get_self<AppearanceConfig>(_DefaultAppearance), weakProfile);
 
     profile->_Deleted = _Deleted;
+    profile->_Orphaned = _Orphaned;
     profile->_Updates = _Updates;
     profile->_Guid = _Guid;
     profile->_Name = _Name;
diff --git a/src/cascadia/TerminalSettingsModel/Profile.h b/src/cascadia/TerminalSettingsModel/Profile.h
index 6fdd5c3ed57..6f79c0cda3b 100644
--- a/src/cascadia/TerminalSettingsModel/Profile.h
+++ b/src/cascadia/TerminalSettingsModel/Profile.h
@@ -113,6 +113,7 @@ namespace winrt::Microsoft::Terminal::Settings::Model::implementation
         void Icon(const hstring& value);
 
         WINRT_PROPERTY(bool, Deleted, false);
+        WINRT_PROPERTY(bool, Orphaned, false);
         WINRT_PROPERTY(OriginTag, Origin, OriginTag::None);
         WINRT_PROPERTY(guid, Updates);
 
diff --git a/src/cascadia/TerminalSettingsModel/Profile.idl b/src/cascadia/TerminalSettingsModel/Profile.idl
index 2d6d1ab609c..ddaa356dec6 100644
--- a/src/cascadia/TerminalSettingsModel/Profile.idl
+++ b/src/cascadia/TerminalSettingsModel/Profile.idl
@@ -41,6 +41,8 @@ namespace Microsoft.Terminal.Settings.Model
 
         // True if the user explicitly removed this Profile from settings.json.
         Boolean Deleted { get; };
+        // True if the user *kept* this Profile, but it disappeared from the system.
+        Boolean Orphaned { get; };
 
         // Helper for magically using a commandline for an icon for a profile
         // without an explicit icon.