Line 3 of the Dalian Metro (R3; Chinese: 大连地铁3号线; pinyin: Dàlián Dìtiě Sān Hào Xiàn) is a rapid transit line running from southwest to northwest Dalian.

The northern area of the city, where the Economic and Technology Development Zone is located, is not well-served by buses.

The metro line beginning at the downtown commercial center (near the Dalian railway station) runs through five administrative districts of the city and serves as an express transport between the northern (developing) region and the downtown area.

The branch route connects central Dalian with Jinzhou District (金州区) with fourteen stations from south to north.

All stations are covered by a combination of transparent corrugated sheets and a concrete roof.