Frances Fitzgerald has received a letter from Judge Iarfhlaith O'Neill
Justice Iarfhlaith O'Neill has asked for more time to investigate the treatment of whistleblowers in the gardaí.
It follows allegations that the Garda Commissioner Noirin O'Sullivan was part of a 'smear campaign' against officers complaining about the force.
Ms O'Sullivan has denied all wrongdoing.
Justice Minister Frances Fitzgerald says she has received a letter from Justice O'Neill, seeking a further extension of time in which to complete his review.
Ms Fitzgerald says Justice O'Neill expects to be in a position to submit his report by December 9th.