The correct country that matches the given properties is Bangladesh.

The country that matches these properties is Bangladesh 🇧🇩 - Without the clue "Its name has at least 10 letters", other countries are: Togo, Kenya, Uganda, and 8 more - Without the clue "Its flag contains red", other countries are: Saint Lucia, Saint Vincent and the Grenadines, and Sierra Leone - Without the clue "Is in the Northern Hemisphere", other countries are: Mozambique and Papua New Guinea

The country that matches these properties is Lithuania 🇱🇹 - Without the clue "Its name has 9 letters", other countries are: Monaco, Nauru, Bahamas, and 26 more - Without the clue "Its flag has at most 3 colors", other countries are: Mauritius, East Timor, The Gambia, and 2 more - Without the clue "Has a population less than 3M", other countries are: Costa Rica, Argentina, Indonesia, and 2 more