Saint Kitts and Nevis is party to the Comprehensive Nuclear-Test-Ban Treaty (CTBT) and a member of key organizations such as the International Telecommunication Union (ITU) and the Hague Code of Conduct Against Ballistic Missile Proliferation (HCoC).
In 2023, Saint Kitts and Nevis strengthened its regional space cooperation by joining the Latin American and Caribbean Space Agency (ALCE), becoming the 20th country to sign the Agreement.