Sri Lanka Cricket (SLC) said its executive committee agreed unanimously that the October 29 match in Lahore should go ahead as scheduled following reassurances of the best possible security.
The cricketers enjoyed the moment as the national cricket players gave Azam a cake facial.
One-drop batsman Babar knocked a fighting 133-ball 103 while Shadab scored a career best 52 not out to lift Pakistan from a struggling 79-5 before Shadab the bowler returned with his best figures of 3-47 to dismiss Sri Lanka for 187 all out in 48 overs.
Meanwhile, Pakistan would play their second match today (Monday), with the series 1-0, the men in green would be eyeing to oush their lead further.
Despite the stunning bowling display from Pakistan, the victory didn't come easy because Sri Lanka skipper, Upul Tharanga, took the responsibility to lead from the front played a stunning fighting knock of 112 that helped Sri Lanka remain in the chase.More news: 6 killed in suspected cylinder blast in Bengaluru
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When is Pakistan vs Sri Lanka 3rd ODI? In August he called for an end to Pakistan's isolation from world cricket.
Gamage had Fakhar Zaman dismissed for 11 and Mohammad Hafeez for eight while Lakmal dismissed out-of-form Ahmed Shehzad for eight.
It were bowlers who helped Pakistan defend a low total despite Tharanga and Jeffrey Vandarsay (22) put up a fighting 76-run eighth wicket stand, but it wasn't enough.
Sri Lanka will play a Twenty20 worldwide in Lahore on 29 October, returning to the city for the first time since they suffered a gun and grenade attack in 2009, Sri Lanka Cricket (SLC) confirmed on Monday.
The board's decision clears Gunathilaka to play in the three-match series starting October 26 in the United Arab Emirates, though the final squad of 15 will not be announced until Friday.