Will I be able to get my non-refundable deposit back?

Each case is unique, so do not substitute this as proper legal advice. First, congratulations on your upcoming marriage.  Second, try to resolve it by contacting the location (asking for a refund or to move the date).  Third, if you put it on a credit card, contact the credit card company.  Fourth, if all else fails yuo may have to proceed with a court case.  Considering everyone is trying to assist each other during this time (Covid-19), no one wants to have a bad reputation.  Hopefully, they will resolve it with you. Proper legal advice is always important, so do not interpret these comments as giving you proper advice because I am unaware of all of the facts in your particular case. Stay safe and healthy!