Shams al-Din Sunqur al-Ashqar al-Salihi (Arabic: شمس الدين سنقر الأشقر الصالحي; c. 1223–1293) was the Mamluk viceroy of Damascus in 1279–1280, who attempted to rule Syria independently, in a rebellion against the Egypt-based sultan Qalawun (r. 1279–1290). While the rebellion in Damascus was quashed in 1280, Sunqur ensconced himself in the Sahyun Castle in the coastal mountains of northern Syria. He joined Qalawun in the successful defense of Syria against the Ilkhanid Mongols at the Battle of Homs in 1281. He remained in a state of peaceful relations with the sultan, despite ruling his coastal principality independently.
Sunqur's rule came to an end with the capture of Sahyun by Qalawun's deputy Turuntay in 1287. Sunqur returned to Cairo, where he was given the highest military ranks and considerable honors and benefits by Qalawun. The latter's son and successor, al-Ashraf Khalil (r. 1290–1293) imprisoned Sunqur and had him executed in 1293 for defying his orders to hand over part of the wealth he ended up controlling after the sultan's earlier execution of Turuntay.