If you're in France, Germany, the UK and Italy and you want to test drive the Q30 for a few days before making the final decision, you could try renting one form Europcar. They plan to add the Infiniti Q30 to their fleet. Maybe if the reception towards the model is positive, Europcar will expand the model's availability outside of the listed four countries.
Seems like the Q30 is exclusively sold as fleet cars only to Europcar. Good for Infiniti since they're selling a lot of units to them. France (255 cars), Germany (345 cars), UK (500 cars) and Italy (100 cars).