Room 3-1

Room 3-1 can refer to:
 * Room 3-1 in Mario vs. Donkey Kong 2: March of the Minis
 * Room 4-1 in Mario vs. Donkey Kong 2: March of the Minis, called "Room 3-1" in the PAL version
 * Room 3-1 in Mario vs. Donkey Kong: Minis March Again!
 * Room 4-1 in Mario vs. Donkey Kong: Minis March Again!, called "Room 3-1" in the PAL version