Hide country names in Country dropdown list under National Identifier section

Summary:

In the Candidate Application Flow on career sites, under the Add National Identifier section, we have to hide few values from the Country dropdown list.

The other Country fields in other sections may remain as is.

So using manage territory we cannot hide these countries.

And using common lookup PER_NATIONAL_IDENTIFIER_TYPE we disenabled the lookup code for a country. This of course did not hide the country name in the NID section but the national ID Type and National ID number fields are disenabled on the page. So the candidate cannot save the National Identifier section using that country.