Space Dogs: Return to Earth (Russian: Белка и Стрелка: Карибская тайна, romanized: Belka i Strelka: Karibskaya Tayna, lit. 'Belka and Strelka: Caribbean Mystery') also known as Space Dogs: Tropical Adventure is a 2020 Russian 3D animated comedy fantasy family film written by Danil Trotensko, Artem Milovanov, Mike Disa, Olga Nikiforova, Viktor Strelchencko and directed by Inna Evlannikova. The film was produced by Moscow studios KinoAtis and Gorky Film Studio. The creators from one of Russia's first national 3D animation studio rejoined to continue to animate the latest adventure of the canine heroes, Belka and Strelka.

The film is the third installment in the Space Dogs franchise, a sequel to the 2013 film Space Dogs: Adventure to the Moon and a trequel to the original record breaking film Space Dogs. The film is the final installment that marks the establishment of the Space Dogs trilogy. Loosely based on true events, the film depicts Soviet space dogs Belka and Strelka, who are the world's first animals who were sent into space and survived the trip (on board the Korabl-Sputnik 2 mission in 1960). The film portrays the historical characters in a lighthearted comedy animation film.

The film is set in outer space and then on planet Earth, where the Soviet command sends Belka and Strelka on a reconnaissance mission to Cuba; there, a mysterious tornado has begun to pull in water off the coast of the island. The astronauts dive into the Caribbean Sea to solve the mystery.

Space Dogs: Return to Earth was released in Russia on 24 September 2020 and the UK on 11 December 2020. Epic Pictures distributed the film in North America on 2 April 2021. Critics from domestic and international countries had generally positive reviews for the film.