Friend: Michael Buble won't perform again until son is better

Music producer David Foster, right, says singer Michael Buble, left, will sing again.

Music producer David Foster said he does not believe that singer Michael Buble will perform again until his 3-year-old son, who was recently

, is better.

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“Everything shuts down around you,” Foster told

. “You go inside your little bubble.”

Earlier this month, the 41-year-old Canadian-born singer and his wife, Luisana Lopilato, shared the news about their son Noah on

and told fans that they would be putting their "careers on hold.

“I don’t think he’ll sing again until his child is well,” Foster said. “I am certain of it.”

Buble just released his seventh studio album, “Nobody But Me.”