There are no countries (in English) with names five letters long with "s" as the second letter.
Spain may be the only one.
The Congo and Kenya, both African countries
BrazilAngolaGambiaMalawiJordanBhutanCyprusRwandaZambiaNorwayRussiaPolandMonacoLatviaFranceGreeceBosniaGuyanaPanamaTuvaluBelizeCanadaMexicoSwedenGuineaTurkeyItalia ?Espana?
AlbaniaAlgeriaAndorraArmeniaAustriaBahamasBahrainBelarusBelgiumBoliviaBurundiComorosCroatiaDenmarkEcuadorEritreaEstoniaFinlandGeorgiaGermanyGrenadaHungaryIcelandIrelandIsraelJamaicaLebanonLesothoLiberiaMaldivesMoldovaMoroccoMyanmarNamibiaNigeriaRomaniaSenegalSomaliaTunisiaUkraineUruguayVanuatuVietnam
Four five nine
Choir, pulpit, chapel, narth, aisle.
I think the only one is Philippines.
The are numerous occupational titles that only have five letters in them. Examples would be nurse, guard, clerk, keyer, agent, and diver.
Italy, India, Egypt and that's all I can think of.
There are no countries with only three letters in their names, but there are 3-letter codes that are used for various purposes. For example, the United Nations has 3-letter country codes and so does the Olympics. For more information about their codes visit the Related Links.
Liechtenstein and Austria are the only two of the five countries that border Switzerland that are landlocked.