Reading out a statement on It Takes Two, Janette said: ““I’m extremely sorry to have to announce that I’m withdrawing from Strictly Come Dancing due to ill health.
“Two years ago, I had open-heart surgery and although I believed it was fit enough to take on Strictly and its demanding schedule, it became clear that I had bitten off way more than I could chew for this stage in my recovery.
“I had begun to feel symptoms that led me to seek an urgent consultation with my heart specialist, and it was her view that it would be better for the sake of my health to step back from the show.
“I’m proud of the three dances that Dianne Buswell and I managed to perform and deeply regret having to let her down like this.”
The Peep Show star concluded the statement by thanking all the Strictly fans who voted for him over the past few weeks.
Strictly Come Dancing returns on Saturday at 7pm on BBC One.