Speedster Kane Richardson claimed three wickets, while all-rounder Glenn Maxwell scored 39 runs as Australia defeated England by seven wickets in a tri-series Twenty20 International match at the Melbourne Cricket Ground (MCG) on Saturday.
D'Arcy Short was 36 not out when Australia reached England's total of 137/7 with more than five overs to spare. The hosts ended on 138/3 after Australia captain David Warner won the toss and elected to field.
It was Australia's third consecutive win in the tri-series, which now shifts to New Zealand and a match Tuesday in Wellington between England and New Zealand.
"It was another poor performance from us," said Buttler. "We never really felt like we had enough (runs). We haven't performed to our abilities as yet, and that's disappointing."
The unbeaten Australians are all but assured of a spot in the February 21 final in Auckland after downing England by five wickets in Hobart and beating New Zealand in the series opener ahead of Saturday's match.
Maxwell and Short combined for 39 off consecutive overs from Liam Dawson and Adil Rashid to end any hopes of an England comeback.
Warner left England in trouble at 34/3 in the fourth over when he ran out Dawid Malan with a direct hit.
Complementing Richardson's three wickets for Australia were Billy Stanlake (2/28) and Andrew Tye (1/29).
(With AP inputs)