3-Up Moons are moons that first appear in Super Mario World. They are crescent shaped moons and have eyes and a smile, and can be found on the ground. They are extremely rare, and very difficult to get. They have a similar effect as 1-Up Mushrooms; however they give Mario or Luigi three extra lives instead of one. New Super Mario Bros. 2 introduced Moon Coins, which are found in World Star; the icon on the coins are similar to the 3-Up Moon. In the Star World of Super Mario World, the moon seen in the sky resembles a 3-Up Moon.
 Super Mario series
 Super Mario World
The locations of the 3-Up Moons in Super Mario World are as follows. If the player replays the level, the moon will disappear from where it was until the game is reset. Most, but not all, 3-Up Moons are only accessible if Mario or Luigi have a Cape Feather.
 Super Mario Advance 4: Super Mario Bros. 3
In Japan, players could scan the Blue Switch e-Reader card and obtain 3-Up Moons in Super Mario Advance 4: Super Mario Bros. 3.
 New Super Mario Bros. U
The 3-Up Moon from New Super Mario Bros. U
3-Up Moons reappear in the Wii U game, New Super Mario Bros. U. They are within 3-Up Moon Blocks, a total of four 3-Up Moons can appear and only be collected with the efforts of the GamePad player and Wii Remote player(s).
 Mario Family
In Mario Family, there is a sewing design of a 3-Up Moon.
 Names in Other Languages
||Lua 3 Vidas (Super Mario World instruction booklet)