This tutorial will show you how to delete a Viber contact on iPhone. There is no way to delete a contact from within Viber.
Step #1 – You must delete the contact from your iPhone’s Contacts app.
Step #2 – In your iPhone’s Contacts app tap on the name of the contact.
Step #3 – Tap Edit in the top right corner.
Step #4 – Scroll all the way to the bottom.
Step #5 – Tap Delete Contact.