The M3 highway () is a partially built road in Moldova, which links ChiÃÂinÃÂu to the southern part of the country via Gagauzia. The road forms part of the European routes E87 and E584 and will have a total length of when completed. The road passes through CimiÃÂlia and Comrat before reaching its southern terminus, at the border tripoint at GiurgiuleÃÂti, where it connects with Romania's DN2B and Ukraine's M15 highway, respectively.
The combined length of the opened segments is . The parts of the road currently in service include the ChiÃÂinÃÂu - Porumbrei segment (32 km) and the CimiÃÂlia - GiurgiuleÃÂti section (161 km).
Construction works on the ChiÃÂinÃÂu - CimiÃÂlia section of the M3 began during Soviet rule in the 1980s. They began to slow down after the dissolution of the Soviet Union in 1991, and stopped in 1996, with only 32 km opened to traffic between ChiÃÂinÃÂu and Porumbrei. Works resumed in 2019, and the section is set to receive motorway status upon completion, thus making M3 the first motorway in Moldova.
Near Comrat, there's a ramification of the M3 linking it to republican road R35; this road is designated the M3.1 and its total length is 4.3 km.