Line 3 is a northâÂÂsouth line on the Nanjing Metro. The line opened on April 1, 2015, running from to . Currently, the line contains 31 stations spanning a total of . Between and , it runs parallel to Line 1.
Phase 3 of Line 3 started construction in 2021. The extension is 3.3 km with 2 new stations. It opened on December 19, 2025.
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.