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Sri Lanka last won the World Cup in 1996 and were beaten in the final in 2007 and 2011.
The 37-year-old Jayawardene ended his test career on a high as his team beat Pakistan by 105 runs to take the two-match series 2-0.
"Right now I don't have any plans and I've not signed any contracts," he said. "It all depends on what kind of interest I get in the next six months or so.
"For me right now the thing is to get myself motivated for the next World Cup, to get myself fit and ready. I can't guarantee I will be part of the squad but my focus will be to try to get another winner's medal."
Right-hander Jayawardene, who compiled 11814 runs at an average of 49.84 in his 149 tests, said the most treasured moment of his 17-year international career was getting his hands on his first cap.
He made his debut against India in Colombo in 1997 in a match where Sri Lanka amassed the highest total in test cricket - 952/6.
"The best day of my life was receiving my first test cap from captain Arjuna Ranatunga," said Jayawardene. "I place a huge value on that cap. I feel very honoured to wear this cap and it's not an easy thing to let go."