Line 3 of the Beijing Subway () is a rapid transit line in Beijing, China. It opened on December 15, 2024. It is colored rose red in system maps.
Phase 1 of Line 3 is with 10 stations. It is fully underground. Due to unstable planning east of Dongbabei station, line 3 will only open between Dongsi Shitiao and Dongbabei. It opened on December 15, 2024.
Phase 1 East extension from Dongbabei to Caogezhuangbei have been approved by NDRC in 2015. The extension will be 6.4 km in length with 5 stations. It will be fully underground.