Sri Lanka have named Wanindu Hasaranga after missing out the second ODI due to injury. He comes in for Dushmantha Chameera.
Sri Lanka have picked four specialist spinners, with Karunaratne and Shanaka are the only seam options.
Australia meanwhile have made just one change. Pat Cummins returns in place of Jhye Richardson. They stick with the long batting line up and one specialist spinner.
Australia have won the toss and will bowl first.Finch has called correctly six out of seven games.
Sri Lanka have bolstered their bowling attack adding Hasaranga in it dropping a pacer while Australia stick to similar line up, just the one change.
Sri Lanka’s last bilateral ODI series win over Australia came in 2010.
Sri Lanka: Niroshan Dickwella (wk), Pathum Nissanka, Kusal Mendis, Dhananjaya de Silva, Charith Asalanka, Dasun Shanaka, Chamika Karunaratne, Wanindu Hasaranga, Dunith Wellalage, Jeffrey Vandersay, Maheesh Theekshana
Australia: David Warner, Aaron Finch (capt), Mitchell Marsh, Marnus Labuschagne, Alex Carey (wk), Travis Head, Glenn Maxwell, Cameron Green, Pat Cummins, Matt Kuhnemann, Josh Hazlewood