Restrict access to your site from a country

If you are using an Apache server, you can Deny it in your htaccess file.

Use this tool

https://www.countryipblocks.net/acl.php

Select which countries you want, and in the  columne  "Select Format" select Apache .htaccess Deny

and click Create ACL

Then Copy ACL to clipboard, and add this in your htaccess file.