Line 3 is a rapid transit line on the Kunming Metro, serving the city of Kunming, China.

It links Line 2 at Dongfeng Square, and links Line 6 at East Coach Station.

It is an east-west line of the system.

Phase I has a total length of 19.16 km (11.91 mi) and 17 stations.

It opened in August 2017 along with Line 6.