How to Remove Email Addresses from Gmail Auto-Complete or Autofill List
Unfortunately, there is no option in Gmail to remove automatically saved email addresses. As Google saves those contacts in Google Contacts, you need to remove such email addresses from the Google Contacts account. The following steps will help
Make sure you log in to your Google account first.
On your browser, go to https://contacts.google.com.
On the search bar on top, type the name or email address of the contact you want to remove.
Click the contact’s name or email address.
On the upper right corner, click the three-dotted icon.
Select Delete.
Click Delete to confirm.
you delete contacts from the Google Contacts on the web.
