Meanwhile, Sri Lanka's limited-overs captain Upul Tharanga has reportedly pulled out of the Lahore T20I due to security concerns and it is likely that the board would not consider him for first two matches as well.
Accordingly, the 15-member squad will be announced on 20 October.
Upon his arrival at Lahore's Allama Iqbal International Airport after attending the International Cricket Council's (ICC) meeting in New Zealand, PCB chief Najam Sethi said that the Sri Lankan cricket chief has confirmed that the Sri Lankan cricket team would play the Third T20 in Lahore on October 29. If the government is confident of the security situation, then the President Sirisena and Prime Minister Ranil Wickremasinghe should also travel to Lahore and attend the Gadafi Stadium. The board officials had also stated earlier that Sri Lanka's players had been promised the same level of security afforded to the World XI team in September, and that the ICC was also willing to send its match officials to Pakistan.More news: European Union imposes oil embargo on North Korea in symbolic gesture
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Three Twenty20 internationals will follow the ODIs, the last in Lahore on October 29.
Sarfraz Ahmed will lead the Pakistan side.
The players have said they remained uncomfortable about travelling to Lahore for the last match of the ongoing series between the two countries in the UAE.
But a World XI squad comprising 13 players from seven top cricket-playing nations played in Lahore last month, with Pakistan hoping the visit would help end years of global isolation.
Opener Fakhar Zaman departed early as Pakistan is 25-1 in second One Day International (ODI).