Cummins, Cotterrell make it to West Indies A
Cummins, 22, was instrumental in helping Barbados win the Regional Four-Day Tournament this season. He claimed 35 wickets at 14.77, with two nine-fors in three matches, the second of which was in the final.
Jamaica's Cotterrell, 23, has 35 wickets at first-class level and Hamilton, 22, has struck one century and five fifties for Leeward Islands.
All three players had featured in last year's Sagicor West Indies High Performance Centre squad.
The squad will be captained by Kirk Edwards.* The tour includes two four-day matches beginning on June 5 in St Kitts, two Twenty20s and three one-dayers.
Squad: Kraigg Brathwaite, Jonathan Carter, Sheldon Cotterrell, Miguel Cummins, Narsingh Deonarine, Kirk Edwards (capt), Assad Fudadin, Shannon Gabriel, Jahmar Hamilton, Leon Johnson, Nikita Miller, Veerasammy Permaul (vice-capt), Chadwick Walton
* - May 31, 2013, 1630 GMT - The story was updated with news of Edwards being named captain