Delhi Capitals head coach Ponting was quoted as saying by ESPNCricinfo that the all-rounder's recovery had taken longer than expected.
"I don't think he'll be coming back.
"Cricket Australia were keen to have him at home to start his recovery process and we sent him back as soon as we could.
"I don't think the T20 World Cup would be an issue," Ponting stressed.
Australia are in Group B of the T20 World Cup, along with England, Namibia, Oman and Scotland.
Delhi Capitals head coach Ponting was quoted as saying by ESPNCricinfo that the all-rounder's recovery had taken longer than expected.
"I don't think he'll be coming back. There's a certain cut-off point with replacement players," Ponting said. "Cricket Australia were keen to have him at home to start his recovery process and we sent him back as soon as we could.
"They've been managing his rehab for a couple of weeks now. I spoke to him the other day and it seems it's taken a little longer than he first thought to get over it."
Ponting further added that he expected Marsh to be fit in time for the global mega event.
"I don't think the T20 World Cup would be an issue," Ponting stressed.
Australia are in Group B of the T20 World Cup, along with England, Namibia, Oman and Scotland. They begin their campaign against Oman on 6 June in Bridgetown.
