The 31-year-old, who played for Australia during the Champions Trophy team in June, suffered the injury during Worcestershire's four-day match against Sussex.
"We sent him for an MRI scan which shows some inflammation through the foot and some stress through a certain bone in his foot," Worcestershire Head of Medicine and Science Ben Davies said in a statement on the club's website. (www.wccc.co.uk)
"Cricket Australia have got international cricket coming up. They want John back in their care and will be hoping to get him fit and available for selection."
Australia have a limited overs tour of India scheduled for September and October before they return home for the Ashes series against England.
First Published: August 10, 2017, 1:46 PM IST