Soyuz TM-3 was the third crewed spacecraft to visit the Soviet space station Mir, following Soyuz-T15 and Soyuz-TM2. It was launched in July 1987, during the long duration expedition Mir EO-2, and acted as a lifeboat for the second segment of that expedition. There were three people aboard the spacecraft at launch, including the two man crew of the week-long mission Mir EP-1, consisting of Soviet cosmonaut Aleksandr Viktorenko and Syrian Muhammed Faris. Faris was the first Syrian to travel to space, and as of November 2010, the only one. The third cosmonaut launched was Aleksandr Aleksandrov, who would replace one of the long duration crew members Aleksandr Laveykin of Mir EO-2. Laveykin had been diagnosed by ground-based doctors to have minor heart problems, so he returned to Earth with the EP-1 crew in Soyuz TM-2.

The Soyuz is a Soviet crewed spacecraft, developed to perform lunar missions with crew. This version called 7K will fly 4 times on the giant launcher N1, and several tens of times on Proton to fly over the Moon, which will be successful during the mission Zond 4. Soyuz will become the first spacecraft to transport living beings on the Moon during the flight of Zond 5, with two turtles. Thereafter, it is adapted to the low orbit and will fly on the Soyuz launcher to supply the Soviet Salyut and Mir stations, and the ISS.