Thank you for the query.
Generally wound older than 12-24 hours can not be sutured because granulation process has taken care of it and it will be wounded by creating new (scar) tissue in the area where the wound is.
Always when the skin gets cut deeply, some small skin branches of nerves are injured. This is very normal. But if you are able to move your finger and flex it in every joint, there is nothing you should worry about. Usually it takes 3 months for such numbness
to go away and there wont be no sign of nerve injury
Hope this will help.