Unai Emery's side have been drawn in Group E of this season's competition with the Portuguese club, Qarabag of Azerbaijan and Ukrainian side Vorskla.
There has been a long-standing conflict between Armenia and Azerbaijan over the disputed Nagorno-Karabakh territory, and in 2016 at least 200 people were killed in clashes between the two nations.
The final of this season's Europa League takes place in Baku, the capital of Azerbaijan, on 29 May.
Chelsea face tough assignments in Group L as they return to Europe's second-tier competition for the first time since they lifted the trophy in 2013. Mikhail Gordeychuk will be looked on to score for BATE while former Arsenal midfielder Alexander Hleb continues to play a role at the age of 37.
Isaac is now the 5th hurricane in the Atlantic
It took Matheson and her husband almost the whole day Monday to drive the 60 miles (100 kilometers) off the barrier island. The massive storm is threatening the East Coast of the U.S. with an expected landfall late Thursday.
Salzburg and Leipzig, which share close ties with energy drink Red Bull, were drawn together in a group with Celtic and Rosenborg.
Confirmed clubs such as Chelsea, Arsenal, Bayer Leverkusen, Villarreal, Anderlecht, Lazio, Sporting CP, Marseille, and AC Milan will be involved in the draw.
The German and Austrian clubs are both allowed to play in European competition after the UEFA Club Financial Control Body ruled last summer that they did not break rules on the integrity of UEFA competitions.
Defending champions Atletico Madrid will not be participating in the group stage, as they secured qualification for the Champions League.
The first group games will played on September 20.