@Klaus **********
you can but you can also apply in several Thai embassies in the region (Hanoi, HCM, Vientianne, Penang, KL, Jakarta, Hong Kong to name a few…) each one has different criteria, prices, waiting times and rules though so best to do some research before selecting which one to go to! In my case applying in Germany would have been much more expensive and time consuming than going on a trip to Hanoi as I was already in the region!