Organisers of the Britain’s Got Talent live show are hoping Susan Boyle would be fit enough to return to the tour.
The 48-year Scottish singer withdrew from the third date of the tour in Manchester on Sunday after she was advised to rest.
She is due to perform on Monday night in her home country at Glasgow SECC but doubts remain about her state of health following her meteoric rise to stardom.
Concert-goers at the Manchester Evening News Arena were greeted at the venue with notices announcing Boyle would not perform at either of the scheduled matinee or evening shows.
A spokesperson for Boyle said: “Following three sensational performances, Susan Boyle has been advised to rest.
“She sends her sincere apologies to her fans for not appearing in Manchester.”
The spokesperson stressed Boyle had not been ruled out of the rest of the 21-date tour across the UK and it was hoped she would return to the stage in Glasgow.
West Lothian church volunteer Boyle went from a quiet life to global fame after the video of her singing I Dreamed A Dream in her Britain’s Got Talent audition was watched hundreds of millions of times on the internet.
The troubled singer was admitted to the Priory clinic after coming second to dance troupe Diversity in the TV contest broadcast on ITV1, but left five days later.
Boyle appeared at the opening show in Birmingham on Friday night, overcoming earlier doubts that she wouldn’t appear on the tour at all.