The 26-year-old carded a bogey-free 64 today (SAT) which had given him an outright lead in the European Tour tournament.
However, a late surge by South African Garrick Higgo saw Mansell overtaken and pushed into second place.
Mansell, a former Chase Terrace Technology College pupil, carded seven birdies and goes into the final round on 18 under par - two shots behind leader Higgo.
And the rising star, based at Beau Desert Golf Club near Cannock, said he felt he was due a low score at the Golf Costa Adeje course, which also hosted last week’s Tenerife Open.
“I’ve seen going low on this course for two weeks now and I feel like I’ve played a few rounds where I could’ve gone really low and didn’t,” said Mansell.
“I missed a few putts early on and I wanted to cut out mistakes and thankfully my short game was good today and holed some putts, which for the last few weeks has been missing.
“I’ve always said if I can putt pretty good I’m going to be there or thereabouts.
“I just played really solid and the biggest mindset was staying gritty and not letting bad stuff faze me.
“I had a couple of holes where I had a little wobble and shirt game game got me out of trouble.
“At this level that’s what you’ve got to do.