Is it permissible to take out an interest-bearing loan to complete a marriage, in the event of continued financial hardship and the unavailability of an alternative?

It is not permissible to take out a usurious loan for the purpose of marriage, as it is one of the gravest sins and is only allowed in cases of dire necessity. There is no necessity in taking out a loan for marriage. And whoever fears Allah and relies upon Him, He will provide for him from where he does not expect.