The Sri Lankan government had not officially announced dates for the visit but developments in the Pakistani capital which is currently the scene of anti-government rallies made the authorities reassess the official visit.
In a meeting with Colombo-based foreign correspondents, Rajapaksa was asked about the Pakistan visit and he said, "We will have to wait and see".
However, he said he was keen to take up with Pakistani authorities the question of a large number of Pakistani nationals in Sri Lanka who had lodged asylum claims with the UNHCR refugee agency.
Sri Lanka had stepped up deportation of Pakistanis following allegations that they were involved in terrorist acts against India.
However, Sri Lankan External Affairs Minister G L Peiris said today that Colombo had assured New Delhi that its soil will not be used for anti-India activities.
"We have constantly assured India that under no circumstances will Sri Lankan soil will be used for any acts against India," Peiris said at a meeting chaired by Rajapaksa.