The Pakistan Cricket Board said Sri Lanka's proposed itinerary for it to visit clashes with the Pakistanis' tour to Bangladesh in March.
Pakistan Cricket Board director general Javed Miandad said he was hopeful the issue with Sri Lanka will be resolved soon.
"They have proposed us three one-day internationals, two test matches and a Twenty20 game," Miandad told The Associated Press on Tuesday. "But the problem is that the matches last until March 7 while we have to go to Bangladesh (for five one-day internationals) from March 3.
"It's not that big an issue. All we need to do is to make some adjustments in the itinerary, which I hope will be done in a day or two."
Sri Lanka agreed to fill the gap after India canceled its tour to Pakistan in January.
Foreign teams have expressed security concerns over playing in Pakistan, which last played a home test in October 2007.
Australia postponed its scheduled tour in March this year, while the Champions Trophy was also postponed for a year after five participating teams _ Australia, New Zealand, England, South Africa and West Indies _ expressed security reservations.