Mega Man III, known as Rockman World 3 (ロックマンワールド３) in Japan, is the third game in the Mega Man World series, released in December 1992. This game is also available to download on the 3DS Nintendo eShop.

Mega Man III uses content from its NES counterpart, Mega Man 3, as well as from Mega Man 4. Following its predecessors for Game Boy, there are only four Robot Masters available to choose at the start of the game, all of which are from Mega Man 3. An additional four Robot Masters are accessible once the first four are completed, the latter all coming from Mega Man 4. Mega Man III also adds some additional features first seen in Mega Man 4, including the ability to charge the Mega Buster to release a Charge Shot, as well as Eddie appearing in certain stages, dispensing a random item.

The game also features a number of changes from its predecessor, Mega Man II: the final four Robot Masters are accessed via a traditional stage select screen, rather than a Wily Teleport System, Special Weapon energy recharges between the stages of the final four Robot Masters, and Robot Master stages can be accessed again via the stage select menu after the Robot Master has been defeated.