Michael Buble says he and his wife are “devastated” after learning their 3-year-old son has been diagnosed with cancer.

The 41-year-old Canadian singer and his wife, Argentine TV actress Luisana Lopilato, said Friday that their son, Noah, is undergoing treatment in the U.S.

“Luisana and I have put our careers on hold in order to devote all our time and attention to helping Noah get well,” they said. “We have a long journey in front of us and hope that with the support of family, friends and fans around the world, we will win this battle, God willing.”

Buble didn’t say what type of cancer his son has.