Coley has been selected as the interim coach for the West Indies' next tours to Zimbabwe and South Africa. Simmons ended his protracted tenure as coach of the Caribbean team when he resigned at the conclusion of the recent two-match Test series in Australia.
Knight was sidelined for a long time during the home summer after she suffered a hip injury during the first of three T20I matches against South Africa.
The trio are the only changes to the 15-player squad which claimed bronze at the recent Commonwealth Games in Birmingham, with Claudia Green, Rosemary Mair and wicket-keeper Jess McFadyen making way.
Henry experienced pain in his left side during training last week and the injured area failed to improve following ongoing treatment from medical staff, the decision was made to replace him in the squad.