The Christian politician, who resigned as Liberal Democrat leader last year following controversy over his views on sexuality, also said he was "saddened" by publicity circulated by the Northern Men's Convention.
Writing on Twitter, he said: "I agreed many months ago to attend a church-organised event but just today I've seen promotional material for it which contains things I'm deeply concerned and saddened by.
"As a result, I have withdrawn from the event."
The Westmorland and Lonsdale MP was due to appear alongside Christian speaker Rupert Bentley-Taylor during the event at Holy Trinity Platt Church on Saturday.
In the welcome section of the conference's website, organisers warn that "assaults on orthodox Christian teaching, and morality, especially in the area of sexuality, seem to have increased at an alarming rate".
They continue: "The leadership from those in authority in the denominations who should be the guardians of Biblical truth has been muted to say the least and even in Bible-teaching churches many appear to be wavering under the onslaught of the gay lobby."
Suggesting that Christians are being increasingly marginalised, they also said believers "fear... standing up and speaking out" about their faith.
I agreed many months ago to attend a church-organised event but just today I've seen promotional material for it which contains things I'm deeply concerned and saddened by. As a result, I have withdrawn from the event.— Tim Farron (@timfarron) May 10, 2018
Based on the theme, 'Holding to the Word of God in the worst of times', organisers promise: "This will be a day to nerve us for action, to increase our confidence in God's word and to point us to the one who is sufficient, and more, for all these things."
In an exclusive interview with Premier in January, Tim Farron said he regretted bowing to pressure he felt during last year's general election to say homosexual sex is not sinful.
Premier has contacted the Northern Men's Convention for a comment.
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