Marsh will undergo further assessment and treatment in Perth and "his availability for the white ball tour of Bangladesh will be determined in due course," said a Cricket Australia spokesperson on Tuesday evening.
Inglis is the fourth choice skipper as regular captain Pat Cummins and his deputy Travis Head were already missing from the squad due to ongoing commitments in the IPL with Sunrisers Hyderabad.
He led a similarly understrength Australia in November 2024, also against Pakistan in white ball matches, when he became the first English-born player to captain Australia for more than 130 years.
The three-match 50-over series begins in Rawalpindi on Saturday (2130 AEST) with Lahore hosting the remaining games on June 2 and 4.
Besides Marsh, Cummins and Head Australia will be without Josh Hazlewood, Mitchell Starc, Cooper Connolly, Xavier Bartlett and Ben Dwarshuis creating opportunities for uncapped youngsters Oliver Peake, Liam Scott and Joel Davies.
Australia will then travel to Bangladesh for three ODIs, reinforced by the return of Head, Connolly, Bartlett and Dwarshuis. A three-match T20 series follows with another altered squad.
Should Marsh not make the Bangladesh ODIs, which start on June 9, Head will presumably take the reins.
REVISED SQUAD (v PAKISTAN ODIs): Josh Inglis (c), Alex Carey, Nathan Ellis, Cameron Green, Matthew Kuhnemann, Marnus Labuschagne, Riley Meredith, Oliver Peake, Matthew Renshaw, Tanveer Sangha, Liam Scott, Matt Short, Billy Stanlake, Adam Zampa.
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