Παρατηρητές διαιτησίας σε παιχνίδια του τρίτου προκριματικού γύρου του Europa League ορίστηκαν ο Γιάννης Τσαχειλίδης, ο Γιώργος Μπίκας και ο Βίτορ Μέλο Περέιρα:
9 August 2018, 20:45 CET – Cork (Turner’s Cross)
Cork City FC (IRL) – Rosenborg BK (NOR)
Referee: Petr Ardeleánu (CZE)
Assistant Referee 1: Tomáš Mokrusch (CZE)
Assistant Referee 2: Jakub Hrabovský (CZE)
Fourth Official: Karel Hrubeš (CZE)
UEFA Referee Observer: Ioánnis Tsachilídis (GRE)
UEFA Delegate: Ísak Mikladal (FRO)
9 August 2018, 20:00 CET – Istanbul (Başakşehir Fatih Terim Stadyumu)
İstanbul Başakşehir (TUR) – Burnley FC (ENG)
Referee: Srđan Jovanović (SRB)
Assistant Referee 1: Uroš Stojković (SRB)
Assistant Referee 2: Milan Mihajlović (SRB)
Fourth Official: Ilija Brdar (SRB)
UEFA Referee Observer: Vítor Manuel Melo Pereira (POR)
UEFA Delegate: Pavel Kolev (BUL)
7 August 2018, 18:00 CET – Yerevan (Vazgen Sargsyan anvan Hanrapetakan Marzadasht)
FC Pyunik (ARM) – Maccabi Tel-Aviv FC (ISR)
Referee: Pol van Boekel (NED)
Assistant Referee 1: Davie Goossens (NED)
Assistant Referee 2: Joost van Zuilen (NED)
Fourth Official: Edwin van de Graaf (NED)
UEFA Referee Observer: Geórgios Bíkas (GRE)
UEFA Delegate: Tanya Gravina (MLT)
