How To Delete Google Voice Contacts. On your computer or laptop go to Google Voices website. Tap the three-dot icon to open more options.
Underneath your Google Voice number click Delete. From Gmails Settings panel head to the Chat section and to the right of Auto-add suggested contacts select the Only allow people option. I found this answer in this complete guide.
Scroll through the alphabetical list of contacts or search for the contact name in the search bar at the top and select it when the desired.
Lets have a further look at how to delete Google Voice Number. However there are circumstances when you cant delete that number. Turn off voicemail by clicking on Voicemail on the left and unchecking the box to Get Voicemail via. You can use the same method to delete calls.