Rudolph III (French: Rodolphe, German: Rudolf; c. 970 – 6 September 1032), called the Idle or the Pious, was the king of Burgundy from 993 until his death.

He was the last ruler of an independent Kingdom of Burgundy, and the last legitimate male member of the Burgundian line of the Elder House of Welf.

In turn, Rudolph in 1006 ceded the city of Basel to his nephew Henry II, elected king of Germany in 1002.

Henry's Salian successor, King Conrad II occupied Basel and also began to negotiate with Rudolph to become his heir.

Rudolph's only attested illegitimate offspring, Hugo, was elected Bishop of Lausanne in 1018 or 1019 and served in this capacity until his death on 31 August 1037.

At least from 1018, Rudolph actually ruled as a mock king in the shadow of his designated successor, Emperor Henry II, who also interfered in domestic conflicts.