It's dependent on the size of the child seats as much as it is the car - especially if the seats will change as kids grow. Some cars will take three across a back row, but they're usually very large cars to accommodate the width of the child seats. I'd also test the seats in the car before you put any money down because some cars offer 3 isofix points but won't fit three seats at once. Dealers should allow you to try the seats in any potential car. Top 10 cars that will take three child seats: heycar.co.uk/blog/top-10-cars-take-three-child-sea...s