No. If the usage of a discount code is limited to a specific number when a customer utilizes it for a purchase, they will not be able to utilize it again, even if the purchase was returned.
For example, a discount code that is limited to a one-time use will not be available again to a customer returning the original purchase in which they utilized the discount code.
Attempting to redeem the code will render the following error message:
To bypass the error message, navigate to the discount and temporarily adjust the Discount Order per Customer. Once the customer has redeemed the discount, adjust the discount Discount Order per Customer back