Dr. Mohamed, at 91 years of age, has become the world’s oldest elected leader.
Malaysian media has reported about a meeting the two had when president Sirisena was in that country on an official visit in December 2016.
It took place at Intercontinental Hotel in Kuala Lumpur, despite obstacles by the then Malaysian regime.
The Sri Lankan high commissioner there was not aware of the meeting.
At the discussion, Dr. Mohamed briefed the Sri Lankan president about the changes and policies he had introduced in the 1980s to develop Malaysia.
Unity among the communities will come after economic growth, he noted.
President Sirisena had wanted to bring down Dr. Mohamed as the chief guest at the second anniversary of his election to office, but that did not materialize as the foreign affairs ministry had not done the required work.
He has congratulated the new Malaysian premier on his election.