How to recover my deleted phone contact in my iphone

Go to icloud.com and log in through your usual method, then go into the Contacts section and there is an option to restore and you can also pick a specific date you want to restore from. This doesn't delete/restore any other data other than Contacts.

Best to achieve this at iCloud.com on a computer - Restore contacts, calendars, and more in Settings on iCloud.com - Apple Support.