Certain uses the ISO (International Organization for Standardization) Country list to determine which countries are available in the Country drop-down menu. This ensures that the information we have in the Certain Platform matches other systems that we integrate with, such as Paypal, Marketo, Eloqua, etc. If a country is not on the ISO Country list, we are not able to add it to the Country drop-down, as it would break Certain Platform's integration with other systems that also use the same standard for countries.

The Country field is available as a standard profile attribute, and can be added to forms collecting registrant information: 

1. From an event, select Plan > Forms > Registrant Details
2. Add Country in the Select Fields section
3. Set the text to display and the available values (or all) for the Country attribute