World 9-3

World 9-3 may refer to:
 * World 9-3 (New Super Mario Bros. Wii)
 * 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.