Messi named in Barca squad
The Argentina forward has not been given the go-ahead to return to action by medical staff yet, but trained with the team on Monday and will fly to Russia, the club said on their website.
The world player of the year has missed Barca's last two league games after suffering ankle ligament damage away to Atletico Madrid a week ago.
French defender Eric Abidal also returned to the squad after a few days off to attend to a personal matter but full-back Adriano Correia missed out with a thigh strain.
Last year's semi-finalists play Rubin Kazan in Group D on Wednesday.