Wardle, who joined the Club this season, will depart the Club at season’s end due to personal reasons.
“It is disappointing to lose Joe, but working through this matter together has delivered a positive outcome for the Club and for Joe and his family,” CEO Matt Gidley said.
“For now, we look forward to having Joe with us for the remainder of this season.”
Wardle will return home and play in the English Super League.
“I would just like to thank Newcastle for helping me through this tough time and understanding my circumstances,” Wardle said.
“It was always going to be a tough task moving to the opposite side of the world with a young family and there was a chance it wouldn’t work out, which is unfortunately the case.
“The future of the Knights is definitely bright and I wish them all the best going forward.”
This was first published on the Newcastle Knights website