The AFC Champions League quarter-finalists have signed the striker from FK Amkar Perm.
The 6'2 striker has inked a two-year-deal with the Korean side and will join the squad for training on Wednesday.
The 29-year-old has a good reputation in Korea, having helped Pohang to continental honors in 2009. He scored 27 goals in 66 appearances for the Korean giants during his two seasons at the club.
Ristic, who has won 15 international caps, then moved to Uzbekistan outfit FC Bunyodkor and he went on to net an impressive 18 goals in 24 matches. His fine form earned him a move to Russian Premier League side Amkar Perm, where he notched six goals in 23 matches.
Ristic has joined Suwon's other three foreigners - Marcel (Brazil), Mato (Croatia) and Alexander Geynrikh (Uzbekistan) as the Bluewings seek to replicate their 2001 and 2002 AFC Champions League successes.
Suwon will host Iran's Zob Ahan on September 14 before travelling to Isfahan for the return leg on September 28.