MR3 or MR-3 may refer to:
- MegaRace 3, a 2002 video game
- Mercury-Redstone 3, the first American human spaceflight
- Monster Rancher 3, a 2001 video game
- MR3 road, a major highway of Eswatini
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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If an internal link led you here, you may wish to change the link to point directly to the intended article.