World 3-B

World 3-B may refer to:
 * World 3-B in New Super Mario Bros.
 * World 3-B in New Super Mario Bros. 2.
 * A Banquet with Hisstocrat, World 3-B in Super Mario 3D World.
 * Bramble Scramble, World 3-B in Donkey Kong Country: Tropical Freeze.