The out-of-favour 'keeper is on standby for the injured Matthew Wade, whom selectors have yet to make a call on, according to superstar captain Michael Clarke.
The Australian skipper said late on Wednesday afternoon, before a final training session, that a decision on whether Wade plays or not will be delayed until the morning of the match starting on Thursday.
Haddin, 35, was flown all the way to India on Monday after Wade injured his ankle in a basketball mishap while at training following the Second Test thrashing in Hyderabad.
Wade is not only in doubt for the Third Test in Mohali, but also the fourth and final clash of the series in Delhi, with team physiotherapist Alex Kountouris revealing the ankle sprain was a "complex" injury.
Haddin is looking likely to return to a Test team in turmoil, after four key players including vice-captain Shane Watson were axed due to disciplinary action.
Watson, quicks Mitchell Johnson and James Pattinson and fringe batsman Usman Khawaja were dropped because they failed to submit a compulsary presentation to coach Mickey Arthur and team manager Gavin Dovey.
Haddin's return would inject significant experience into the relatively young side, which has struggled during their tour of the sub-continent following the recent retirements of Test champions Ricky Ponting and Mike Hussey.
Haddin lost his place in the Australian Test team to a rising Wade, who is 10 years Haddin's junior.
The Australians trail the series 0-2 with two Tests to come.