M3 motorway may refer to:
- M3 motorway (Great Britain), a motorway in England
- M3 motorway (Hungary), a motorway in Hungary
- M3 motorway in the Republic of Ireland, part of the N3 national primary road
- M3 motorway (Northern Ireland), an urban motorway in Belfast, Northern Ireland
- M3 motorway (Pakistan)
- M-3 (Michigan highway), a state highway in the Detroit metropolitan area
- M3 (Cape Town), an expressway in Cape Town, South Africa
- M3 highway (Russia), another name for the Ukraine Highway in Russia
- M3 freeway or EastLink (Melbourne) in Victoria, Australia
|This disambiguation page lists articles about roads and streets with the same name.
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