MR3 or MR-3 may refer to:
* ''
MegaRace 3'', a 2002 video game
*
Mercury-Redstone 3
Mercury-Redstone 3, or ''Freedom 7'', was the first United States human spaceflight, on May 5, 1961, piloted by astronaut Alan Shepard. It was the first crewed flight of Project Mercury. The project had the ultimate objective of putting an as ...
, the first American human spaceflight
* ''
Monster Rancher 3
''Monster Rancher 3'' (known in Japan as ) is the third game in Tecmo's ''Monster Rancher'' series. It is the first game in the series for the PlayStation 2.
Gameplay
This game uses cel-shaded graphics to give the game a more cartoon-like feel. ...
'', a 2001 video game
*
MR3 road
The MR3 road, also known as the Matsapha–Mbabane–Ngwenya road or Road No. MR3, is a major highway of Eswatini. It is one of the most heavily trafficked roads in the country, crossing it from east to west. Along with the MR7 and MR8 roads, it ...
, a major highway of Eswatini
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