Sri Lanka defeated Pakistan by 44 runs in the fourth one-day international in Colombo on Saturday to gain a 2-1 lead in the five-match series.
Seamer Thisara Perera (4-42) bagged a hat-trick as Sri Lanka, who scored 8-243, bowled Pakistan out for 199 despite a 113-run stand for third wicket between opener Azhar Ali (81 not out) and skipper Misbah-ul-Haq (57).
Kumar Sangakkara top-scored for Sri Lanka with a 130-ball 97 while off-spinners Mohammad Hafeez and Saeed Ajmal, and paceman Sohail Tanvir each bagged two wickets for Pakistan in the day-night match.
Pakistan won the opening one-dayer by six wickets and Sri Lanka won the second game by 76 runs in Pallekele, while the third match was abandoned due to rain in Colombo on Wednesday.
The fifth one-dayer will be played in Colombo on Monday.