The star will be flying back to the US to be with Ozzy, whom she said she is “very worried about right now.”
It means Sharon will miss hosting her hour-long panel discussion show The Talk, which also features Jeremy Kyle.
In an emotional interview, Sharon promised to return to the show as soon as possible and said she could join The Talk via video link from Los Angeles in the next few days.
Sharon said: “Ozzy was only diagnosed in the middle of the night in our time. I talked to him and he’s fine. I’m really worried about Ozzy right now.
“We’ve been two years without him getting covid and now it’s just Ozzy’s luck.”
On missing her show, Sharon added: “I can’t believe my luck. I’m missing the show and I’ve only been there three days. Three days and I’m missing the show, but I’ll be back. I know I will.
“It will take me a week to get my old man back and I will be back.”
Sharon is one of the faces of the new TalkTV channel launched by News UK earlier this week.