Robert Brooke Campbell Scarlett, 6th Baron Abinger (8 January 1876 – 10 June 1927) was a British peer.
Scarlett was the second son of Lieutenant-Colonel Leopold James Yorke Campbell Scarlett. He succeeded his older brother Shelley in 1917. In 1904, he (along with his siblings Hugh, Ruth, Percy, and Leopold) had been allowed to use the style The Honourable by a Royal Warrant of Precedence.
He was a barrister of the Inner Temple and served in the Royal Navy.
In 1917, Lord Abinger married Marguerite Jeanne Steinheil (née Japy). Steinhell's claims to fame hitherto rested partly from having been obliquely described as present at the death of French President Félix Faure in 1899 and for having been acquitted of murdering her husband in 1909. They had no male heirs, and the title of Baron Abinger passed to the 6th Baron's younger brother Hugh.