From 30 April 1830 to 17 June 1833 "Clio" was under Commander John James Onslow. Around 19 July 1830 she sailed for South America, and on 15 December she was in Rio de Janeiro. Next, on 2 January 1833, "Clio" participated in the re-establishment of British rule on the Falkland Islands. Onslow arrived at Luis Vernet's settlement at Port Louis to request that the Argentine authorities replace the flag of the United Provinces of the River Plate with the British one and leave the islands. Lieutenant-Colonel José María Pinedo, of the schooner "Sarandi" considered resisting, but as most of his crew were British, thought better of it and sailed on 5 January.