In my opinion and the way I see it, A3 is an entry level Audi not a proper 4 door car. Its basically just for satisfaction of driving a German car with 4 rings. The interior is too cramped for a 4 million plus car.
Minimum level of an acceptable family saloon when you go German is A4. This middle order is not worth the buck. If you have to drive alone or 2 adults then A3 might be okay, still the front view and dashboard is cramped. The rear passengers can be children they'd be fine but adults would be in trouble.
But this is me and my thinking. Even if I had 4 million I would never buy an A3 and prefer a used A4 2014 in the same budget. Else Civic is atleast a proper sized family car. Please keep in mind I am not talking about build quality etc, just the small size alone puts me off from A3. And when its not a proper sized saloon to be considered, let alone I would look further into quality and stuff.