David III Strathbogie, Earl of Atholl

David III Strathbogie (1309–1335) was the son of David II Strathbogie, Earl of Atholl, whose title was forfeited after he defected to England. In 1327 David served with Edward III on the Weardale campaign in Scotland, and in 1332 joined the disinherited lords who backed Edward Balliol.

He fought at Dupplin Moor, where Balliol restored him as Earl of Atholl, and at Halidon Hill in 1333. He changed sides twice during the wars that followed, returning to Balliol in 1335. On 30 November 1335 he was killed at Culblean fighting the guardian Andrew Murray's army. His son David IV never reclaimed Atholl.