The actress played Melanie Owen in the BBC soap for four years, choosing to leave the role in 2002. Outhwaite has previously denied speculation that she had been invited and turned down the opportunity to make a comeback.
She told ITV's This Morning: "I've never been approached [to go back]. Would I go back? I don't know. I wouldn't see it as a failure to go back - it's a great show and it was a great character.
"I just think it's not necessarily right now. But you know, I loved it! I've just never been asked and I think people always think that I'm turning them down; and I'm not!"
Meanwhile, speaking about her latest theatre project Di and Viv and Rose, Outhwaite said that the role was a "breath of fresh air".
"It's about three woman and life through their eyes really - friendship, loyalty and the way that it's written you are laughing one minute and then crying the next... it's kind of like therapy every night!"
Adding that the character of Di was her first time playing a gay role, Outhwaite said that taking the production to the West End is a "real ambition".
> Outhwaite 'struggled with depression'