The Blancpain Endurance Series Amateur Cup title winner from last year joins experienced Kiwi Jono Lester and top rated Malaysian Fairuz Fauzy in the line-up.
Talbot replaces French driver Philippe Descombes.
At the previous race at Fuji early last month the McLaren was controversially given a pitlane penalty which snuffed out its chances of victory after the McLaren had come from behind to lead.
“I'm looking forward to having my first taste of the the McLaren and the unique challenges it will present,” Talbot said.
“However I don't underestimate the challenge of a new car, new team and new track,” he said.
Team founder Cornelius Ee is excited at the prospects of the addition of Talbot.
“I think Liam will form a great partnership with Jono and Fairuz, thus our driver line-up will be very competitive in Buriram,” Ee said.