diff --git a/dev-ruby/memoist3/Manifest b/dev-ruby/memoist3/Manifest
new file mode 100644
index 0000000000000..66d5d63b637ee
--- /dev/null
+++ b/dev-ruby/memoist3/Manifest
@@ -0,0 +1 @@
+DIST memoist3-1.0.0.gem 14336 BLAKE2B f331f084c8ad60524941020121fb11532496c8c839756d4528a8f6815c36065864cb814f906e4ee51cf1065a63c46b8edfab9cc7a4c67a83f2ee7ebd551c2c0a SHA512 8e7fad4ef0f0949fb4a2574feb4dba4c48324ee130eed001f2c8f4f3426576205f78e54e0b8dfe944807c99941589e0af90086d1083e079bb1b239b8e4fe3aca
diff --git a/dev-ruby/memoist3/memoist3-1.0.0.ebuild b/dev-ruby/memoist3/memoist3-1.0.0.ebuild
new file mode 100644
index 0000000000000..384121ef1daa8
--- /dev/null
+++ b/dev-ruby/memoist3/memoist3-1.0.0.ebuild
@@ -0,0 +1,22 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+USE_RUBY="ruby32 ruby33 ruby34"
+
+RUBY_FAKEGEM_EXTRADOC="README.md"
+
+inherit ruby-fakegem
+DESCRIPTION="ActiveSupport::Memoizable with a few enhancements"
+HOMEPAGE="https://github.com/honzasterba/memoist"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~sparc ~x86"
+
+ruby_add_bdepend "test? ( dev-ruby/minitest )"
+
+all_ruby_prepare() {
+	sed -i -e '/bundler/ s:^:#:' Rakefile || die
+}
diff --git a/dev-ruby/memoist3/metadata.xml b/dev-ruby/memoist3/metadata.xml
new file mode 100644
index 0000000000000..3cf11e8f65362
--- /dev/null
+++ b/dev-ruby/memoist3/metadata.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="project">
+    <email>ruby@gentoo.org</email>
+    <name>Gentoo Ruby Project</name>
+  </maintainer>
+  <upstream>
+    <remote-id type="rubygems">memoist3</remote-id>
+    <remote-id type="github">honzasterba/memoist</remote-id>
+  </upstream>
+</pkgmetadata>