diff --git a/pkgs/applications/window-managers/ion-3/default.nix b/pkgs/applications/window-managers/ion-3/default.nix
deleted file mode 100644
index 2ecbea730741..000000000000
--- a/pkgs/applications/window-managers/ion-3/default.nix
+++ /dev/null
@@ -1,53 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-  lua,
-  gettext,
-  groff,
-  libice,
-  libsm,
-  libx11,
-  libxext,
-}:
-
-stdenv.mkDerivation rec {
-  pname = "ion";
-  version = "3-20090110";
-
-  src = fetchurl {
-    url = "https://tuomov.iki.fi/software/ion/dl/ion-${version}.tar.gz";
-    sha256 = "1nkks5a95986nyfkxvg2rik6zmwx0lh7szd5fji7yizccwzc9xns";
-  };
-
-  buildInputs = [
-    libice
-    libsm
-    libx11
-    libxext
-    lua
-    gettext
-    groff
-  ];
-
-  buildFlags = [
-    "LUA_DIR=${lua}"
-    "X11_PREFIX=/no-such-path"
-    "PREFIX=\${out}"
-  ];
-
-  # Build system is missing depends for autogenerated export headers:
-  #   luac -o mod_tiling.lc mod_tiling.lua
-  #   main.c:21:10: fatal error: exports.h: No such file or directory
-  enableParallelBuilding = false;
-
-  installFlags = [ "PREFIX=\${out}" ];
-
-  meta = {
-    description = "Tiling tabbed window manager designed with keyboard users in mind";
-    homepage = "https://tuomov.iki.fi/software/ion/";
-    platforms = with lib.platforms; linux;
-    license = lib.licenses.lgpl21;
-    maintainers = [ ];
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index a69895799605..f80dc14c2068 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -916,6 +916,7 @@ mapAliases {
   intel2200BGFirmware = warnAlias "'intel2200BGFirmware' has been renamed to 'ipw2200-firmware'" ipw2200-firmware; # Added 2026-02-08
   invalidateFetcherByDrvHash = throw "'invalidateFetcherByDrvHash' has been renamed to/replaced by 'testers.invalidateFetcherByDrvHash'"; # Converted to throw 2025-10-27
   ioccheck = throw "ioccheck was dropped since it was unmaintained."; # Added 2025-07-06
+  ion3 = throw "ion3 was dropped since it was unmaintained."; # Added 2026-02-18
   ipfs = throw "'ipfs' has been renamed to/replaced by 'kubo'"; # Converted to throw 2025-10-27
   ipfs-migrator = throw "'ipfs-migrator' has been renamed to/replaced by 'kubo-migrator'"; # Converted to throw 2025-10-27
   ipfs-migrator-all-fs-repo-migrations = throw "'ipfs-migrator-all-fs-repo-migrations' has been renamed to/replaced by 'kubo-fs-repo-migrations'"; # Converted to throw 2025-10-27
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7248bde9e8d4..a4ff8c6e6126 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10004,10 +10004,6 @@ with pkgs;
     callPackages ../applications/graphics/inkscape/extensions.nix { }
   );
 
-  ion3 = callPackage ../applications/window-managers/ion-3 {
-    lua = lua5_1;
-  };
-
   jabcode = callPackage ../development/libraries/jabcode { };
 
   jabcode-writer = callPackage ../development/libraries/jabcode {