If you enter an incorrect PIN code three times during a card payment, your card will be temporarily blocked. The blockade will expire on the next day (from 00:01) and you will be able to enjoy all the card functionalities again.
If you have forgotten your PIN code, check here how to view it.
If you urgently need to make a transaction during the card blockade, you can use another physical card (if you have one), a virtual card for online payments. Apple Pay or Google Pay will allow you to make transactions without using a PIN code. In this case, the form of transaction confirmation will be Face ID or Touch ID.