Jayasuriya, the tournament's top scorer to date after two half centuries, wrote his name into the record books once again by conceding the inaugural competition's worst bowling figures of 0-64.
The main damage was suffered at the hands of rookie Pakistan skipper Shoaib Malik who top-scored with 57 out of a total of 189 for six, with support from Younis Khan (51) in a stand worth 101 from only 58 balls.
Sri Lanka then never recovered from the loss of three early wickets, despite a 56-run partnership between Chamara Silva and Mahela Jayawardena who made 28 before holing out on the boundary, caught by Mohammed Hafeez off Shahid Afridi.
When Silva perished to the same bowler for 38 off 27 balls, an always daunting run chase drifted out of Sri Lanka's reach and they finished on 156 for nine at the end of their 20 overs.
Afridi finished with figures of four for 18, which included the wicket of Gayan Wijekoon who was out for a duck.
There were also two wickets for Mohammed Asif who