21st February 2018, 11:38 | Wigan
The 31-year-old prop forward was contracted to the Warriors to the end of 2019 but sought a release for personal reasons and is now expected to return his old club Sydney Roosters.
Nuuausala joined Wigan midway through the 2016 season and in only his 11th game in England helped them win the Betfred Super League Grand Final at Old Trafford.
He went on to make 47 appearances but was dropped for Wigan’s round-two game against Hull FC in Wollongong earlier this month and ignored for their friendly against South Sydney Rabbitohs last Saturday.
Wigan executive director Kris Radlinski said: “Frank and his family have struggled to adapt to life in the UK.
“His family are currently back in Australia, having decided to stay there following the close-season break, and his situation was becoming increasingly difficult by the day.
“We agreed that it would be best for both parties to allow him to be released from the remainder of his contract with Wigan in order for him to return home.
“Frank had a positive impact on the squad in 2016 when he provided a timely boost towards the end of the year that ultimately ended in Grand Final glory.
“We thank Frank for his service and wish him and his family well for the future.”
Nuuausala, who caused a stir when he publicly slated the famous Wigan pie, said: “I’ve enjoyed my time at Wigan.
“I don’t think I reached my full potential whilst being here but I leave with fond memories of winning the Grand Final and the World Club Challenge.
“Not many people can say they’ve played for Wigan and I’m proud to have done so.
“Wigan as a club have really accepted me and all of the coaching staff and players have been great with me during my time here.”