Evil aliens have decided to kill everyone on Earth! Fortunately, they've given you two minutes to save as many as you can. All you have to do is name a country to save everyone in it.
You have an odd notion of what constitutes an island nation. Dominican Republic, UK, Ireland are all island nations. Just because they share an island with another country doesn't mean they aren't island nations. They should either be included or you should specify that you're asking specifically for countries that don't share an island.