Dan Sullivan, president and chief executive of Collette, confirmed the sales team announcement to TTG.
Jeff Roy, executive vice-president of revenue management at Collette, added in a statement: "In order to focus on its expanding operations in the US, Canada and Australia, Collette has decided to no longer have a physical presence in the UK marketplace beyond April 30, 2020.
"Collette continues to accept new reservations for travel up to April 30, 2020, which will operate with full Atol and Abta protection."
Existing reservations will operate as booked.
"Agents and guests can continue to travel and book with confidence," added Roy.