Ntuli recently returned to Sundowns from a third straight loan spell at Platinum Stars (now called Cape Umoya United), having only played twice for the Absa Premiership champions since his 2014 signing from Golden Arrows.
The 27-year-old, who was also previously loaned to AmaZulu by Downs, reportedly attracted interest from Usuthu, Maritzburg United and Bidvest Wits at the end of last season.
However, according to a source a firm offer has been placed for his services from abroad.
"Ntuli is moving overseas," says the informant.
"There is a concrete offer from a team in Europe.
"He is due to leave the country this weekend."
Meanwhile, fellow attacker Mogakolodi Ngele still faces an uncertain future at Chloorkop following his return from a loan spell at SuperSport United.
Both Ntuli and Ngele were recently training on their own at the Tshwane giants.