Privateer Tom Chilton will join factory Citroen driver Jose Maria Lopez and Yvan Muller for the Manufacturers Against the Clock in Russia this weekend.
Chilton will replace Sebastien Loeb Racing team-mate Mehdi Bennani who has driven all Mac3 sessions so far this year.
"Having been the best-performing manufacturer in MAC3 so far this season, Citroen will opt for a change of strategy this time around. Jose Maria Lopez and Yvan Muller will be joined not by Mehdi Bennani, who provided effective support in the first five meetings, but by Tom Chilton. After spending the first part of the season getting to grips with the Citroën C-Elysee WTCC, the SLR driver is in fine form, coming off twin podium finishes at the Nurburgring," read a statement from Citroen.
Chilton and the Citroën factory duo will be up against Honda and Lada in the MAC3 session which awards points to the manufacturers' championship.