Sarfraz Ahmed makes a successful run out appeal against Angelo Perera during the final T20 match at the Gaddafi Cricket Stadium in Lahore on Wednesday. AFP
Debutant Oshada Fernando struck a brilliant 48-ball 78 with three sixes and eight boundaries. For Pakistan paceman Mohammad Amir took 3-27.
Sri Lanka successfully defended totals in the first two games and is chasing its first-ever 3-0 victory in a three-match bilateral series.
With the series already won, Sri Lanka made five changes from the team, which beat Pakistan by 35 runs on Monday.
Lahiru Madushanka, Oshada Fernando, Angelo Perera, Lahiru Kumara and wicketkeeper-batsman Sadeera Samarawickrama all got their first match in the series. The visitors left out experienced seamers Isuru Udana and Nuwan Pradeep along with batsmen Shehan Jayasuriya, Avishka Fernando and Minod Bhanuka.
Pakistan dropped out-of-form Umar Akmal and Ahmed Shehzad after both batsmen failed to make a mark in the first two matches.
Middle-order batsman Haris Sohail replaced Akmal, while Iftikhar Ahmed came in place of Shehzad. Left-arm fast bowler Usman Shinwari replaced Mohammad Hasnain as Pakistan made three changes.
Players and match officials will be wearing pink ribbons to promote awareness about breast cancer.
Sri Lanka: Dasun Shanaka (captain), Danushka Gunathilaka, Sadeera Samarawickrama, Bhanuka Rajapaksa, Angelo Perera, Oshada Fernando, Wanindu Hasaranga, Lahiru Madushanka, Lakshan Sandakan, Lahiru Kumara, Kasun Rajitha.
Pakistan: Sarfaraz Ahmed (captain), Babar Azam, Fakhar Zaman, Haris Sohail, Iftikhar Ahmed, Asif Ali, Imad Wasim, Shadab Khan, Wahab Riaz, Mohammad Amir, Usman Shinwari.
Sarfaraz Ahmed's side needed to smash the world record for margin of victory in a one-day international but, after winning the toss at Lord's, they failed to muster enough runs to give them a chance.
Bangladesh must be all out for seven or lower if Pakistan are to deny New Zealand a place in the semi-finals alongside Australia, India and England.
Lawmakers from Pakistan, England, Australia, New Zealand, India, Bangladesh and Afghanistan participated in the four-day tournament where the final was played between Pakistan and Bangladesh.
Waqar shares a meaningful note to define the sportsmanship of the champions after India suffered their first defeat of this World Cup against the hosts
Novak Djokovic admitted on Sunday he will miss injured rival Roger Federer as he prepares to begin his charge for the Dubai Championships.
New Zealand quick Trent Boult declared himself “happy to be back” as he bagged three wickets to leave India struggling for survival at stumps on day three of the first Test in Wellington on Sunday.
Andre Villas-Boas had few excuses for his Marseille team on Saturday after their 14-match unbeaten run in Ligue 1 came to an end with a surprise 3-1 home defeat by off-form Nantes.