Sri Lanka Cricket (SLC) Secretary Mohan de Silva claimed he was satisfied with the security arrangements in place in Pakistan but the final decision for embarking on the tour hinges on the feedback from the defence ministry.
The tour, consisting of three ODIs and three T20Is, is scheduled to commence on September 27 while the final game will be played in Lahore on October 9.
Militants attacked the Sri Lankan team amidst a Test match in Lahore in March 2009, resulting in serious injuries to six players.
The horrific terrorist attack brought international cricket in Pakistan to a halt as teams shied away from travelling to the country.
Since the attack, Pakistan hosted its first international series in 2015 when Zimbabwe toured to play three ODIs and two T20Is.
A depleted Sri Lankan squad captained by Thisara Perera also visited Lahore in October 2017 to play a single T20 match.
"Earlier last month I visited Pakistan along with our security consultant and we were satisfied with the arrangements," De Silva said.
"They have promised security reserved for a head of state."
The limited-overs series was put on hold last week when Sri Lanka's prime minister's office received information regarding a terror threat targeting its players hours after announcing the two squads.
SLC thus approached the government to conduct a reassessment of the security situation.
The Pakistan Cricket Board (PCB) responded that it wasn’t aware of any intelligence report but was committed to providing full-scale security to the touring side.
Earlier, ten senior Sri Lankan players including ODI captain Dimuth Karunaratne and T20 skipper Lasith Malinga had withdrawn from the tour due to security concerns.