Taunton, England:Marcus Trescothick quit Somerset's Twenty20 Champions League squad in India following a recurrence of the stress problems that led to his retirement from Test cricket.
Somerset has qualified for the Super Eight stage but will now play on without an opening batsman who scored 1,817 runs in this season's County Championship at an average of 75.70.
"Marcus Trescothick has made a great effort to travel to India to attend this exciting tournament," director of cricket Brian Rose said on Thursday. "Regrettably it has not worked out for him regarding his personal well-being and he has traveled back to England to rejoin his family.
"The club and all his team mates have fully appreciated this effort and personal commitment and look forward to further success on his behalf."
The 33-year-old Trescothick retired from international cricket last year after suffering from a stress-related condition on previous overseas tours with England.