To remove a card in Google Pay:
Go to the Google Pay App on your device, select the card you want to remove, tap on the three dots in the top right hand corner of the screen and select "Remove payment method". A confirmation message is displayed. Tap, "Yes, remove". Your mobile card will be removed from your Google Pay wallet.
Alternatively, you can permanently erase all the data on your device via Google's Find my Device. If you are using Find my Device, you will require network connectivity.
See Google Pay Pay Help Center for more information.
To temporarily suspend a card in Google Pay:
To suspend payments using Google Pay, you can disable contactless payments for the mobile card in your Google Pay wallet.
Go to the Google Pay App on your device, select the card you want to suspend, tap on the three dots in the top right hand corner of the screen and select "Disable contactless". A confirmation message is displayed. Tap "Yes, disable". You will not be able to make contactless payments with your card in Google Pay until you set it up for payments again.
Your physical card is not impacted by the above, and you can continue making transactions with it.
What happens when I lock my physical card?
If your physical card is temporarily locked, it will also be temporarily locked in Google Pay and you will not be able to transact with that card using your device.