Lahiru Thirimanne scored an unbeaten century to guide Sri Lanka to its series levelling victory.
Earlier, Sri Lanka produced an inspired bowling performance to bundle out Australia for a modest 170.
Electing to field, Sri Lanka put tremendous pressure on the young Australian batting line-up and didn’t allow any easy runs.
Brad Haddin was the top run-getter for the hosts, as the other Australian batsmen struggled against the Sri Lankan bowling attack.
Haddin's half-century was the only bright spot for the Aussies. The comeback wicketkeeper batsman struck four boundaries and a six to score 50 off 67 balls.
Haddin added 57 runs for the seventh wicket with Ben Cutting, which was Australia's highest partnership.
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