diff --git a/gen/tollvm.cpp b/gen/tollvm.cpp
index 656ea4f4654..c3535b921c4 100644
--- a/gen/tollvm.cpp
+++ b/gen/tollvm.cpp
@@ -259,7 +259,15 @@ LLGlobalValue::LinkageTypes DtoLinkageOnly(Dsymbol *sym) {
 }
 
 LinkageWithCOMDAT DtoLinkage(Dsymbol *sym) {
-  return {DtoLinkageOnly(sym), needsCOMDAT()};
+  bool hasCOMDAT = needsCOMDAT();
+  auto appliedLinkage = DtoLinkageOnly(sym);
+
+  // generate COMDAT for templates to enable linking data culling
+  // See https://github.com/ldc-developers/ldc/issues/3589 .
+  if (sym->isInstantiated())
+    hasCOMDAT |= appliedLinkage != LLGlobalValue::InternalLinkage;
+
+  return {appliedLinkage, hasCOMDAT && supportsCOMDAT()};
 }
 
 bool needsCOMDAT() {
@@ -274,6 +282,18 @@ bool needsCOMDAT() {
   return global.params.targetTriple->isOSBinFormatCOFF();
 }
 
+bool supportsCOMDAT() {
+  const auto &triple = *global.params.targetTriple;
+  return !(triple.isOSBinFormatMachO() ||
+#if LDC_LLVM_VER >= 500
+           triple.isOSBinFormatWasm()
+#else
+           triple.getArch() == llvm::Triple::wasm32 ||
+           triple.getArch() == llvm::Triple::wasm64
+#endif
+  );
+}
+
 void setLinkage(LinkageWithCOMDAT lwc, llvm::GlobalObject *obj) {
   obj->setLinkage(lwc.first);
   obj->setComdat(lwc.second ? gIR->module.getOrInsertComdat(obj->getName())
diff --git a/gen/tollvm.h b/gen/tollvm.h
index f8e195d2ace..fa77f164dc6 100644
--- a/gen/tollvm.h
+++ b/gen/tollvm.h
@@ -68,6 +68,7 @@ typedef std::pair<llvm::GlobalValue::LinkageTypes, bool> LinkageWithCOMDAT;
 LinkageWithCOMDAT DtoLinkage(Dsymbol *sym);
 
 bool needsCOMDAT();
+bool supportsCOMDAT();
 void setLinkage(LinkageWithCOMDAT lwc, llvm::GlobalObject *obj);
 // Sets linkage and visibility of the specified IR symbol based on the specified
 // D symbol.