| Honorific Prefix: | The Right Honourable |
| The Lord Ashcombe | |
| Spouse: | |
| Issue: | Rosalind Shand Henry Cubitt, 4th Baron Ashcombe Jeremy Cubitt |
| Parents: | Henry Cubitt, 2nd Baron Ashcombe Maud Calvert |
| Birth Name: | Roland Calvert Cubitt |
| Birth Date: | 26 January 1899 |
| Birth Place: | London, England |
| Death Place: | Surrey, England |
Roland Calvert Cubitt, 3rd Baron Ashcombe, (26 January 1899 – 28 October 1962) was a member of the British aristocracy. He became Baron Ashcombe on the death of his father Henry Cubitt, 2nd Baron Ashcombe, in 1947. He was the maternal grandfather of Queen Camilla.
Cubitt was educated at Eton and the Royal Military College, Sandhurst. He was a Lieutenant in the Coldstream Guards, and was appointed to be a Deputy Lieutenant in 1939 and held office as Vice-Lord Lieutenant of Surrey in 1940.[1]
On 16 November 1920 he married Sonia Rosemary Keppel, daughter of the hon. George Keppel and his wife Alice Keppel, at the Guards Chapel, Wellington Barracks, in London. They were divorced in 1947 after having three children:
m. Virginia Carington (daughter of Peter Carington, 6th Baron Carrington)
m. Mary Elizabeth Dent-Brocklehurst (née Chipps) (widow of late Mark Dent-Brocklehurst)
Roland married secondly, on 6 August 1948, Idina Joan Mills who died in 1954 (former wife of Lieut. John Charles Trueman Mills), daughter of Col. Robert Edward Myddelton, and his wife Lady Violet Wellesley.
He married thirdly, on 2 July 1959, Jean Baylis (former wife of Greville Pollard Baylis), daughter of Charles Tuller Garland (d.1973).
He died on 28 October 1962 is buried in the churchyard of St Barnabas's Church, Ranmore Common, Surrey.