There are various European roads numbered A3 appearing in Euro Truck Simulator (ETS 1), Euro Truck Simulator 2 (ETS 2) or related games. The following list describes their existence in the game(s).
| Country | Road | Game | Nearby Cities |
|---|---|---|---|
| Albania | Autostrada 
|
ETS 2 (Euro Truck Simulator 2: West Balkans) | Tirana, Bitola |
| Belgium | Autobahn 
|
ETS 2 | Liège |
| Bulgaria | Avtomagistrala 
|
ETS 2 (Road to the Black Sea) | Pernik, Sofia |
| Croatia | Autocesta 
|
ETS 2 (Euro Truck Simulator 2: West Balkans) | Zagreb, Osijek |
| France | Autoroute A3 | ETS 2 | Paris |
| Germany | Autobahn 
|
ETS 2 | Frankfurt am Main, Nürnberg |
| Latvia | Autoceļš 
|
ETS 2 (Beyond the Baltic Sea) | Rīga |
| Luxembourg | Autoroute 
|
ETS 2 | Luxembourg (city) |
| North Macedonia | Avtopat / Автопат
|
ETS 2 (Euro Truck Simulator 2: West Balkans) | Bitola, Skopje |
| Portugal | Autoestrada 
|
ETS 2 (Iberia) | Porto |
| Romania | Autostrada 
|
ETS 2 (Road to the Black Sea) | Cluj-Napoca, Târgu Mureș |
| Serbia | Autoput/Аутопут
|
ETS 2 (Euro Truck Simulator 2: West Balkans) | Osijek, Belgrade |
| Spain | Autovía 
|
ETS 2 (Iberia) | Madrid, València |
| Switzerland | Autobahn 
|
ETS 2 | Zürich |