Dissanayake, who was disgruntled with the opposition leader Ranil Wickremasinghe over the decision to support General Fonseka instead of fielding a candidate from the party, had a meeting with the President, Mahinda Rajapaksa yesterday at his residence in Hanguranketha.
According to a report in a Sri Lankan daily, Dissanayake summoned his supporters and made an emotional farewell speech following the meeting with the President.
The UNP strongman was not present at the party's 54th convention held at the Nawaloka Esplande in Welisara yesterday morning to introduce General Fonseka as the party's choice for president.
Dissanayake crossed over to the UNP in 2001 from SLFP during the Chandrika Kumaranatunga administration.