The couple finished bottom of the leaderboard on Saturday night, with their waltz receiving just 27 points.
Once the dances had been performed again, the judges gave their verdict, with all four of them stating that they would like to save Mark.
After hearing the news, Sunetra said: "It’s been such a once in a life time opportunity to be able to do this. I’d like to thank Brendan for being just so committed and understanding, and such a natural dancer this guy - you’ve been great - thank you so much for everything.
"I also want to say a thank you to every single one of the contestants and all the pro dancers for holding my hand so very tightly – love you all.”
“She was a dancer form the beginning, I am extremely proud of her," Brendan added. "You should be very proud of yourself to get this far- it’s no mean feat!
"To reiterate thanks to everyone that works on the show - it’s the best show on television!”
Next week's show will be the Quarter Finals and the celebrities have the added task of a 'Waltzathon', where they will perform at the same time in a bid to gain more points.