The actress, who is currently appearing in Sweet Charity in the West End, left the BBC One soap in 2002.
Speaking about the possibility of heading back to Albert Square, she told DS: "People always ask me, but I've never been asked! It looks like I'm turning it down on a yearly basis, but I'm not.
"They've never asked me! So they don't want me back for one and I don't have any family left on the show. There's nobody on the Square she knows, I don't even think any of Mel's friends are still in it... I could walk down the market and be an extra, I suppose!"
She added: "There's lots of other stuff I would like to do, but it would be great to just make a living out of doing what I'm doing right now with Sweet Charity and this new show Don't Stop Believing."
Outhwaite will appear as a judge on reality show Don't Stop Believing, which launches on Sunday at 7pm on Five.