They used to have one until a couple of years ago. It was taken over by Barcelo group. So I would say unlikely they are going to have another one soon unless a franchisee leaves a different hotel chain.

http://en.centralamericadata.com/en/...l_in_Guatemala

It was located at:
Guatemala City Marriott Hotel3 star hotel
7 Avenida 15-45 Zona 9
Guatemala City 01009, Guatemala

A picture of it and some details - of all places - Foreign Affairs:
http://www.foreignaffairs.com/files/.../guatemala.pdf