Mega Man III is an action-platform video game by Capcom for the Nintendo Game Boy. It is the third game in the handheld version of the Mega Man series. The game follows the title character Mega Man as he fights the evil Dr. Wily, whose latest attempt to conquer the world involves sucking energy from the Earth's core to power a new machine. Along with foes from his past, Mega Man must contend with the next robot in Wily's line of "Mega Man Killers", Punk. Like its two consecutive predecessors on the Game Boy, the game combines elements from two previously released Nintendo Entertainment System (NES) titles: Mega Man 3 and Mega Man 4. In 2013, Mega Man III was made available on the Virtual Console of Japan's Nintendo eShop for the Nintendo 3DS. It was later released in the North American and PAL region eShops the following year.

Mega Man is a Japanese science fiction video game franchise created by Capcom, starring a character named "Mega Man". The original game was released for the Nintendo Entertainment System in 1987, and spawned a franchise that expanded to over 50 games on multiple systems. As of October 2023, the series has sold 41 million units worldwide.