The line opened on April 1, 2015, running from Linchang to Mozhou­donglu.

Currently, the line contains 29 stations[2] spanning a total of 44.87 kilometres (27.88 mi).

[1] Between Nanjing South Railway Station and Nanjing Railway Station, it runs parallel to Line 1.

Phase 3 of Line 3 started construction in 2021.

[5] Phase 4 of Line 3 is still planning, according to a Jiangbei New District plan map, line 3 will have a northern extension, through Nanjing North railway station to Hupoquan.