diff --git a/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
index 797cb1f16939..99af050d7baf 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml
@@ -1025,8 +1025,8 @@
       <listitem>
         <para>
           <literal>pkgs.pgadmin</literal> now refers to
-          <literal>pkgs.pgadmin4</literal>. If you still need pgadmin3,
-          use <literal>pkgs.pgadmin3</literal>.
+          <literal>pkgs.pgadmin4</literal>. <literal>pgadmin3</literal>
+          has been removed.
         </para>
       </listitem>
       <listitem>
diff --git a/nixos/doc/manual/release-notes/rl-2205.section.md b/nixos/doc/manual/release-notes/rl-2205.section.md
index 351ef6448289..3e883625664e 100644
--- a/nixos/doc/manual/release-notes/rl-2205.section.md
+++ b/nixos/doc/manual/release-notes/rl-2205.section.md
@@ -377,8 +377,7 @@ In addition to numerous new and upgraded packages, this release has the followin
   you should change the package you refer to. If you don't need them update your
   commands from `otelcontribcol` to `otelcorecol` and enjoy a 7x smaller binary.
 
-- `pkgs.pgadmin` now refers to `pkgs.pgadmin4`.
-  If you still need pgadmin3, use `pkgs.pgadmin3`.
+- `pkgs.pgadmin` now refers to `pkgs.pgadmin4`. `pgadmin3` has been removed.
 
 - `pkgs.noto-fonts-cjk` is now deprecated in favor of `pkgs.noto-fonts-cjk-sans`
   and `pkgs.noto-fonts-cjk-serif` because they each have different release
diff --git a/pkgs/tools/admin/pgadmin/3.nix b/pkgs/tools/admin/pgadmin/3.nix
deleted file mode 100644
index 4e9d674d0cf6..000000000000
--- a/pkgs/tools/admin/pgadmin/3.nix
+++ /dev/null
@@ -1,63 +0,0 @@
-{ lib, stdenv, fetchurl, fetchpatch, postgresql, wxGTK, libxml2, libxslt, openssl, zlib, makeDesktopItem }:
-
-stdenv.mkDerivation rec {
-  pname = "pgadmin3";
-  version = "1.22.2";
-
-  src = fetchurl {
-    url = "https://ftp.postgresql.org/pub/pgadmin/pgadmin3/v${version}/src/pgadmin3-${version}.tar.gz";
-    sha256 = "1b24b356h8z188nci30xrb57l7kxjqjnh6dq9ws638phsgiv0s4v";
-  };
-
-  enableParallelBuilding = true;
-
-  buildInputs = [ postgresql wxGTK openssl zlib ];
-
-  patches = [
-    (fetchpatch {
-      sha256 = "09hp7s3zjz80rpx2j3xyznwswwfxzi70z7c05dzrdk74mqjjpkfk";
-      name = "843344.patch";
-      url = "https://sources.debian.net/data/main/p/pgadmin3/1.22.2-1/debian/patches/843344";
-    })
-  ];
-
-  preConfigure = ''
-    substituteInPlace pgadmin/ver_svn.sh --replace "bin/bash" "$shell"
-  '';
-
-  configureFlags = [
-    "--with-pgsql=${postgresql}"
-    "--with-libxml2=${libxml2.dev}"
-    "--with-libxslt=${libxslt.dev}"
-  ];
-
-  # starting with C++11 narrowing became an error
-  # and not just a warning. With the current c++ compiler
-  # pgadmin3 will fail with several "narrowing" errors.
-  # see https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Dialect-Options.html#index-Wno-narrowing
-  makeFlags = "CXXFLAGS=-Wno-narrowing" ;
-
-  meta = with lib; {
-    description = "PostgreSQL administration GUI tool";
-    homepage = "https://www.pgadmin.org";
-    license = licenses.gpl2;
-    maintainers = with maintainers; [ domenkozar wmertens ];
-    platforms = platforms.unix;
-  };
-
-  postFixup = let
-    desktopItem = makeDesktopItem {
-      name = "pgAdmin";
-      desktopName = "pgAdmin III";
-      genericName = "SQL Administration";
-      exec = "pgadmin3";
-      icon = "pgAdmin3";
-      categories = [ "Development" ];
-      mimeTypes = [ "text/html" ];
-    };
-  in ''
-    mkdir -p $out/share/pixmaps;
-    cp pgadmin/include/images/pgAdmin3.png $out/share/pixmaps/;
-    cp -rv ${desktopItem}/share/applications $out/share/
-  '';
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 1b3810baaf3e..4159b1dd0bbf 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -847,6 +847,7 @@ mapAliases ({
   perlXMLParser = throw "'perlXMLParser' has been renamed to/replaced by 'perlPackages.XMLParser'"; # Converted to throw 2022-02-22
   perlArchiveCpio = throw "'perlArchiveCpio' has been renamed to/replaced by 'perlPackages.ArchiveCpio'"; # Converted to throw 2022-02-22
   pgadmin = pgadmin4;
+  pgadmin3 = throw "pgadmin3 was removed for being unmaintained, use pgadmin4 instead."; # Added 2022-03-30
   pgp-tools = throw "'pgp-tools' has been renamed to/replaced by 'signing-party'"; # Converted to throw 2022-02-22
   pg_tmp = throw "'pg_tmp' has been renamed to/replaced by 'ephemeralpg'"; # Converted to throw 2022-02-22
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 08479d754a1c..b1424aa6cce1 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -34023,10 +34023,6 @@ with pkgs;
 
   pgadmin4 = callPackage ../tools/admin/pgadmin { };
 
-  pgadmin3 = callPackage ../tools/admin/pgadmin/3.nix {
-    openssl = openssl_1_0_2;
-  };
-
   pgmodeler = libsForQt5.callPackage ../applications/misc/pgmodeler { };
 
   pgf = pgf2;