Please create a constructed list for the same using below code and call the list in the question. The parent list will have 3 members - Country 1, Country 2, Country 3.
c needs to be changed with the pass-in field variable name.
Also, the above code that I provided can be used if I do not want to show the single select question to the respondent. The question will be skipped and the data will be stored and the skips will work normally.
If you want to show the question to the respondent and response to be pre-selected, please copy the below code in the footer of the question:
var coun=[% c %]; /*Change c with the pass-in field variable*/
SSI_SetSelect("[% QuestionName() %]_"+coun,true);