Steve Dymond was set to appear as a guest on the show, which has now been pulled off air indefinitely following the shock revelations on Monday. The 63-year-old, named by The Sun, died just a week after the show was filmed. He participated in a lie detector test in a bid to prove that allegations he had cheated on fiance Jane Callaghan were not true.
However, he was found to have cheated and days later reports suggest he died of a drugs overdose.
Ms Callaghan told The Sun that she and Mr Dymond had got engaged on Christmas day in 2017.
She said: “He was crying, the love was real. He was the most generous and loving person.
“He was quietly struggling and we didn’t know at the time. He cheated on me, I know he did.
“I can’t forgive but I just want him to be alive.”
Despite the controversial nature of the show, she praised the show’s team for their aftercare efforts.
She said just before they were set to record the show, Mr Dymond had convinced her he hadn’t cheated.
The show was recorded on May 2 but Ms Callaghan revealed she last saw him four days before he was found dead last week.
The broadcaster said the episode featuring the participant who died will be submitted for a review due to the “seriousness of this event”.
An ITV spokeswoman said: “Everyone at ITV and The Jeremy Kyle Show is shocked and saddened at the news of the death of a participant in the show a week after the recording of the episode they featured in and our thoughts are with their family and friends.
“ITV will not screen the episode in which they featured.”
Monday’s edition of the programme was cancelled and immediately replaced by a filler programme.
The channel has now suspended the programme to “conduct a review” of the episode and what happened.
A celebrity edition of the show starring former X Factor contestant Christopher Maloney and ex-EastEnders actress Danniella Westbrook was due to air on Tuesday, but will be rescheduled, according to both stars.
The tabloid talk show sees host Kyle and psychotherapist Graham Stanier help the guests talk through their personal issues in front of a studio audience.
The programme has had its regular daytime morning slot on ITV since 2005.
Damian Collins, chairman of the Commons Digital, Culture, Media and Sport Committee, told the Daily Mail: “TV companies have a duty to care to the people who take part in their programmes.”