Australia got off to a flier courtesy of captain and opening batsman Aaron Finch's 53 runs off 32 balls. His partner Michael Klinger scored a controlled 62 runs off 43 balls to help take the hosts to a total of 187.
Sri Lanka began impressively but wickets tumbled as they struggled to cope with leg-spinner Adam Zampa, losing five wickets, including that of in-form all-rounder Asela Gunaratne, between the eighth and 12th over.
Zampa and medium pacer James Faulkner picked up three wickets each. Australia were fielding a below-full-strength side with their test squad currently in India.
Gunaratne was named man-of-the-series after scoring half centuries in the first two matches.
(Reuters - thestar.com.my)