Almost all banks implement this. It's a standard security system procedure that after entering incorrect PIN 3 times in the ATM, your ATM card will be blocked. It means, you cannot use your ATM card in any ATM machines. But for how long? Usually the locking period is just 24 hours (1 day).
After 24 hours, you can use your ATM card again. You can use it in an ATM (machine) and withdraw money, transact anything in an ATM.
When you badly needed money at the moment when your ATM card is block after entering wrong PIN 3 times, you should withdraw over-the-counter. Go inside the bank and withdraw your money.
Why do banks block ATM access after entering 3 wrong PINs?
This is a security system feature of banks to avoid or minimize unauthorized usage of the clients' ATM card. Without it, it will be easy for the thief or the person who holds your ATM card to guess the ATM PIN for several times.
Your ATM PIN serves as a door key that prohibits someone to enter your bank account.
Do you have any related problem with your bank account or ATM card?