Making the case against changing Australia's marriage laws to SBS Punjabi in October 2017, Mr Singh raised concerns about the children of same-sex marriages.
"It has got very serious implications on the kids which we can't see now, but when these children grow up how they reconcile with that situation is beyond comprehension."
He later added: "I think it is also an issue of paedophilia - in these situations the occurrence can be high."
While several candidates from across the political spectrum have been dumped or forced to resign over offensive or inappropriate remarks, Mr Singh continues to enjoy the Liberal Party's backing.
Last week, Prime Minister Scott Morrison indicated the views of candidates reflected on the leader of a party, as he criticised Bill Shorten for not disendorsing Luke Creasey sooner.
"The standard you walk by is the standard you accept," Mr Morrison said.
But asked about Mr Singh's homophobic comments on Wednesday, Mr Morrison was satisfied the matter had been handled by the party organisation.
Asked how it had been dealt with, Mr Morrison responded: "His candidacy has continued."
Treasurer Josh Frydenberg told ABC Radio in Melbourne that the decision not to disendorse Mr Singh was taken a couple of weeks ago.
Mr Frydenberg said Mr Singh did not hold those views now.
"He apologised unreservedly for those comments," Mr Frydenberg said on Thursday.
Labor's Andrew Giles holds the seat of Scullin by a margin of 17 per cent.
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