The judgment, handed down by the Court of Appeal in Melbourne on Thursday, means the Pitch Perfect actress will receive about $3.9 million less than she had originally been awarded.
The actress is now filming in Europe, and ahead of the decision, took to Twitter last night to say that regardless of the level of payout, she had won the case. The Sydney Morning Herald said the articles "painted her as a serial liar". Wilson was not present in court for the ruling.
On Thursday, however, the Victorian Court of Appeal reduced the sum to A$600,000, saying that Wilson had failed to prove that Bauer was responsible for her missing out on the roles.
The star of three "Pitch Perfect" movies and "Bridesmaids" won A$4.6 million ($3.5 million) in damages from the German publisher a year ago after a court found a series of articles accusing her of lying about her age, name and childhood events had cost her roles.
"In particular, this court has rejected the finding that Rebel Wilson lost the opportunity to earn AU$15m by being cast in lead or co-lead roles in three Hollywood feature films during the period from mid-2015 to the end of 2016", Justice Pamela Tate said.
Just Cause 4 trailer brings the thunder with extreme weather
Lara is shown taking out an enemy in the midst of rope swinging, which shows off just how sneaky she'll have to be to survive. Bisson says that the game will feature the largest hub, more tombs, and unique mechanics like wall-running and grappling.
"I'm away on location in Europe filming right now", she tweeted on Wednesday night.
In its appeal against the decision, Bauer Media argued that the $4.5 million payout was excessive and should be set aside due to errors in fact and law.
"It was important for us to revisit the award of damages", said Adrian Goss, Bauer Media's general counsel, according to the Australian paper.
It was the biggest defamation payout in Australian legal history.
Rebel won the case back in September, when she told her fans she pledged to donate the money.
Amy Lieu is a news editor and reporter for Fox News.