I gave a deposit for an apartment. My situation has changed and now I can not move in. Can I get my money back?

It all depends on your escape clause in the lease agreement. You have to phone your landlord.

You mention giving a deposit?

Normally, when you do this, you also sign a lease, did you just forget to mention that, or have you given a deposit, without the signing of a lease?

This small detail will have an effect on how your question may be answered.

Yes, what paper work or agreement either written or verbal was done at the time you gave a deposit,