The Billing Address and Shipping Address fields on the checkout pages include a list of about 250 countries for the customers' location. However, if you are shipping or providing services to customers in a specific list of countries, you might want to show only these countries in the countries drop-down.
The countries list for the shipping and billing address can be restricted from the back end by our support team.
To restrict the countries list, you can send us a CSV (Attached Below) with the list of countries(Code and name) that you require in the drop down. The attached sample CSV which contains the list of all the countries that we display, exclude the countries that you do not require from this sheet and send it over to our Support Team at firstname.lastname@example.org.