The voyagers heaped up the most astounding aggregate in the arrangement so far of 316-4 in the wake of choosing to bat and afterward rocked the bowling alley Sri Lanka out for 181.
The match was hindered for 30 minutes in the second session when stones tossed from outside the stadium arrived on the field almost a Pakistani defender.
Sarfraz Ahmed scored 77 and Yasir Shah snatched four wickets as Pakistan whipped Sri Lanka by 135 keeps running in the roughness hit third one-day universal.
All-rounder Mohammad Hafeez compensated for a year-long boycott on knocking down some pins because of a suspect activity with a cleaned 54 as Pakistan heaped up 316-4 subsequent to choosing to bat in the day-night match.
Leg-spinner Yasir then shone with the ball as Sri Lanka were packaged out for 181 in 41.1 overs on a moderate pitch at the Premadasa stadium.
Match ref Javagal Srinath of India quickly requested the players off the field as hostile to uproar police squads emptied onlookers from two squares of stands close to the monster scoreboard taking after the group intercession.
The match, which was seen by Pakistan batting extraordinary Zaheer Abbas - the present president of the Worldwide Cricket Committee (ICC) - continued after the short break, with Pakistan finishing a simple win for a 2-1 lead in the five-match arrangement.
Lahiru Thirimanne, who top-scored with 56, was the main Sri Lankan batsman to offer resistance as whatever is left of the batting broken down. Opener Kusal Perera was the following most astounding benefactor with 20.
Hafeez's fourth score of 50 or more in the last six one-day innings based on a 93-run opening remain between Ahmed Shehzad (44) and captain Azhar Ali (49).
Hafeez, 34, had on Friday been banned from rocking the bowling alley for a year by the ICC after his activity was ruled to be illicit - for the second time in the most recent eight months.
Be that as it may, the previous chief guaranteed he contributed with the bat with a stroke-filled half-century to take after his 103 in the opening match of the arrangement.
Sarfraz, elevated to number four from drop down the request, defended the chief's confidence with seven limits in his 74-ball thump.
The gutsy wicket-manager put on 72 for the third wicket with Hafeez and 61 for the fourth with Shoaib Malik to support the aggregate, before he was run out in the 45th over.
Malik, viewed from the stands by his tennis-playing Indian wife Sania Mirza, struck an unbeaten 42 from 29 balls and shared an unbroken fifth-wicket stand of 59 with Mohammad Rizwan (35 not out).
The pair crushed 21 keeps running in the last over, played by Lasith Malinga, to leave Sri Lanka pursuing the most elevated aggregate in the arrangement in this way.
Pakistan had won the opening match in Dambulla and Sri Lanka took the second in Pallekele.
Ninth-positioned Pakistan need an arrangement win to stay in controversy for a spot in the eight-country Champions Trophy in Britain in 2017. Sri Lanka, presently positioned fifth, are guaranteed of joining in the competition.
The fourth match will be played at the same venue on Wednesday.