Sri Lanka Head Coach Nic Pothas pulled out of the Pakistan tour along one other member of support staff, it surfaced on Saturday.
Sri Lanka had earlier announced a 15-man T20 squad for the three-match T20 series against Pakistan.
Thisara Perera will lead the squad for the series in which the first two matches will be played in Abu Dhabi on October 26 and 27, before flying to Lahore for the last match on October 29.
The Sri Lankan T20I squad includes Thisara Perera (captain), Dilshan Munaweera, Danushka Gunathilaka, Sadeera Samarawickrama, Ashan Priyanjan, Mahela Udawatte, Dasun Shanaka, Sachith Pathirana, Vikum Sanjaya, Lahiru Gamage, Seekkuge Prasanna, Vishwa Fernando, Isuru Udana, Jeffrey Vandersay, and Chathuranga de Silva.