Presently in Dubai, he will announce his exit from SLC once he returns home, reports say.
Jayantha left a meeting to discuss arrangements for the Bangladesh series halfway into the discussion, as SLC president Thilanga Sumathipala had not informed him about the decision-making.
He has told a friend that he had not been told that Asanka Gurusinghe would be enrolled as manager of the national team, although he had no objections to the decision.
In a signal that he will not come back to SLC, Jayantha had taken away his coat from his office, which usually is kept there all the time, several employees of the institution told Sri Lanka Mirror.
Thilanga had the backing of Jayantha to become the cricket chief.