World 9-3

World 9-3 may refer to:
 * World 9-3 in Super Mario Bros.: The Lost Levels.
 * World 9-3 in New Super Mario Bros. Wii.
 * Spiky Surprise, World 9-3 in Donkey Kong Country Returns 3D.
 * Swim for Your Life!, World 9-3 of New Super Mario Bros. U.
 * Star Coin Deep Dive, World 9-3 of New Super Luigi U.
 * Clowning Around, World 9-3 in Super Mario Maker.
 * World 9-3 in ''Super Mario Maker for Nintendo 3DS.