Last updated on December 1, 2020
Open the WhatsApp application and select the contact you want to block. When you click on the three vertical dots located in the top right of the screen (settings menu), a drop down list will appear with an option “More”. Tap that option.
Then Click Block and then select OK to confirm that you want to block the selected person.
Steps to block WhatsApp contacts
Source: Handbook on Information Security, Sri Lanka CERT – CC