The three players are currently training with the club's development team after spending last season on loan elsewhere.
According to a source at Sundowns, the trio are in talks with management regarding an exit from Chloorkop.
"The players are not training with the senior team and are only training with the development side to honour their contracts," says the source.
"The club is still engaged in talks with them to allow them to move elsewhere this coming season."
Mbatha was farmed out to Mpumalanga Black Aces in 2015/16, while Nomandela and Kumalo spent time at Jomo Cosmos.