The tragic news for the Buble family continues to unravel.
Noah Buble is now undergoing chemotherapy that will last for four months, Argentinian publication, Gente, confirmed.
The news comes less than a week since Michael and his wife, Luisana, shared the news that their son was diagnosed with cancer, but would not confirm which type.
In a Facebook post at the time, Michael said he and his family are "devastated" by the diagnosis.
"We are devastated about the recent cancer diagnosis of our oldest son Noah who is currently undergoing treatment in the US," Michael wrote.
"We have always been very vocal about the importance of family and the love we have for our children. Luisana and I have put our careers on hold in order to devote all our time and attention to helping Noah get well. At this difficult time, we ask only for your prayers and respect for our privacy. 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.”
Michael's sister-in-law, Daniela Lopilato, revealed Noah's diagnosis to Gente but says she "has faith" in his ability to fight the liver cancer.
"The time to start a long and very difficult treatment has come but it’s got to be done. They say children are normally strong to put up with chemotherapy and my nephew is a warrior," she said, according to News Corp.
Daniela also revealed Noah's diagnosis came after he was taken to a hospital in Buenos Aires with a high fever. While it was originally thought it was just a throat infection. It wasn't until an ultrasound found an abnormality in the toddler's liver that they sent him for a biopsy in Los Angeles, where a cancer diagnosis was confirmed.
Noah will reportedly require four months of chemotherapy and possibly surgery to remove a tumour.
However, not all news is bad news with the child allegedly having a 90 per cent chance of beating the disease.