"Is he going to play against Melbourne? No, he won't play," said Hasler.
Barba's likely comeback game will be against South Sydney in round four on Easter Friday next week and Hasler said his time away from league would not have set back his preparation for the season.
"The programme that Ben underwent was just fantastic for him so we are really pleased," Hasler said.
"I don't think the time away would have set him back a long way at all. In fact, it might not have set him back at all.
"Physically, he is okay so [the decision on when Barba returns] it will be made by our HP [high performance] department. And we will be making that decision halfway through next week."
-AAP