Terra-3 was a Soviet laser testing centre, located on the Sary Shagan anti-ballistic missile (ABM) testing range in the Karaganda Region of Kazakhstan. It was originally built to test missile defence concepts, but these attempts were dropped after the Anti-Ballistic Missile Treaty was signed. The site later hosted two modest devices used primarily for experiments in space tracking. Several other laser test sites were also active during this period. During the 1980s, officials within the United States Department of Defense (DoD) suggested it was the site of a prototypical anti-satellite weapon system. The site was abandoned and is now partially disassembled.

Sary Shagan is an anti-ballistic missile testing range located in Kazakhstan.