How soon before rhinoplasty should I remove my nose ring?

Hello.
Great question. Congratulations on your upcoming procedure. However, I will suggest discussing your pre op concerns directly with your surgeon's office. Every surgeon has their own pre op protocols. 

Dear shannonreidy,
every plastic surgeon has his own preoperative protocol which he recommends to his patients. Generally speaking, there should be no reason not to remove the piercing on the morning of the surgery. I would suggest you to discuss this with your plastic surgeon.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

In my opinion, you can leave it as late as you want. I see no reason why they can't be taken out just before your surgery. Replacing it afterwards may be more complicated, depending on what your surgeon has planned and the positioning of the piercing, of course. I would advise you to discuss this with your surgeon before and after your surgery