Vitslav III (1265/8–1325), variously called Vislav, Vizlav, Wislaw, Wizlaw and Witslaw in English sources, was the last Slavic ruler of the Danish Principality of Rugia.

He was the son and successor of Vitslav II, and as such one of the Wizlawids descended from Kruto of Wagria.

Vitslav had two daughters, Euphemia and Agnes (wife of Albert II, Prince of Anhalt-Zerbst), and a son, Jaromar.

But Jaromar died in May 1325, shortly before his father, and Vitslav faced the prospect of leaving no male heir.

Fourteen songs and thirteen poems by this author have been preserved as an addition to the Jenaer Liederhandschrift (foll.