diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 567c5866bc37..a0bd7d69112e 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -10648,11 +10648,6 @@ self: super: with self; {
 
   proto-plus = callPackage ../development/python-modules/proto-plus { };
 
-  # Protobuf 3.x
-  protobuf3 = callPackage ../development/python-modules/protobuf/3.nix {
-    protobuf = pkgs.protobuf3_20;
-  };
-
   # Protobuf 4.x
   protobuf4 = callPackage ../development/python-modules/protobuf/4.nix {
     protobuf = pkgs.protobuf;