Lightning and heavy rain delayed the toss by more than two hours on Thursday, with play at one stage appearing highly unlikely.
But the weather cleared in time, umpires shortening the contest to seven overs-a-side for the first of three T20I clashes.
Pakistan won the toss and will bowl first, with Jake Fraser-McGurk and Matt Short listed to open for the hosts.
A minimum of five overs per side is required to constitute a game.
Pakistan arrived full of confidence after back-to-back thumpings of Australia clinched their one-day international series 2-1.
Wicketkeeper Josh Inglis is set to captain Australia, who are without a host of stars ahead of the Test series against India starting next Friday.
Games in Sydney on Saturday, and Hobart on Monday will follow the Brisbane clash.
AUSTRALIA: Jake Fraser-McGurk, Matt Short, Josh Inglis (c/wk), Glenn Maxwell, Marcus Stoinis, Aaron Hardie, Xavier Bartlett, Nathan Ellis, Adam Zampa, Spencer Johnson.
PAKISTAN: Babar Azam, Mohammad Rizwan (c/wk), Sahibzada Farhan, Usman Khan, Salman Agha, Irfan Khan, Abbas Afridi, Shaheen Shah Afridi, Haseebullah Khan, Haris Rauf, Naseem Shah.
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