Prescott transferred to the 7th Regiment of Foot and was brevetted colonel in the army on 25 June 1772;[3] he went to Canada in 1773. On the reduction of Montreal by the Americans in 1775, Prescott attempted to take Quebec from American forces in 1775, but was forced to surrender to the Americans on 17 November. In September 1776, he was exchanged for General John Sullivan. In November, he became colonel of his regiment. In December, he was third in command of the expedition against Rhode Island, where he remained in command of the British forces before the Battle of Rhode Island.
Lieutenant-Colonel William Barton and a force of 40 men captured Prescott at his quarters on Prescott Farm in Rhode Island on 10 July 1777 and took him to Providence. Prescott was eventually moved and imprisoned in Connecticut, splitting time between East Windsor and Enfield. He was later again exchanged, this time for General Charles Lee. Prescott resumed his command in Rhode Island but was almost immediately superseded by Sir Robert Pigot.
McBurney, Christian M. (2013). Kidnapping the enemy. The Special Operations to Capture Generals Charles Le & Richard Prescott. Westholme Publishing. p. 234. ISBN978-1594161834.