Robert Leke, 3rd Earl of Scarsdale (9 March 1654 – 27 December 1707) was an English politician and courtier, styled Lord Deincourt from 1655 to 1681.
He was related by marriage to the Earl of Huntingdon, a firm adherent of James and one of the very few non-Catholics to support him until the end.
Like the vast majority, Scarsdale resigned from his offices in 1687 as a protest against his religious policies and supported the 1688 Glorious Revolution.
However, he was arrested during the 1692 invasion scare and joined Huntingdon as one of only five peers to vote against the 1701 Act of Settlement barring Catholics from the British throne.