I want to restore a contact i deleted

If you were syncing Contacts with iCloud, go to iCloud.com/Account Settings using a browser, and under Advanced at the bottom left, select Restore Contacts.

If you weren't syncing Contacts with iCloud, do you have a backup you can restore from? Restoring from a backup erases all data currently on your device. Any data newer than when the backup was made will be erased. A restore is an all or nothing restore. You can't access a backup to see the contents and only restore certain files.

Backup - Restore your device from an iCloud or iTunes backup.    *

ASC YouTube for how to restore an iPhone, iPad, or iPod touch from an iCloud backup

ASC YouTube for how to restore your iPhone or iPad from a backup on your Mac