Merenna Koralage Don Ishara Amerasinghe (born 5 March 1978), or Ishara Amerasinghe, is a Sri Lankan cricketer who attended Nalanda College Colombo.
A right-arm fast-medium bowler with a side-on action, Amerasinghe was named in the 30-man provincial squad for the 2007 World Cup.
Despite not making it to the Caribbean he was selected in the Sri Lankan squad for a post World Cup tournament against Pakistan at Abu Dhabi.
He made his One Day International debut in the first game of the series but failed to take a wicket.
However, he made significant strides in the 2008 CB series, where he picked up 8 wickets at 35.75 each.