What you have is a rock problem from the vehicle traveling in front of you.
I am fellow cx3 owner 2016 myself, have had car less then 6 months, my paint is failing, over 12 chips, paint is flaking off. If you own a cx3 you need to write to Mazda Canada Warranty - I have been to 3 Paint detailer shops, the primer is failing - The hood of your will flake off in a couple of years.
Was told they used a cheaper/ in their words more envirmently friendly paint this year on the cx3 - Mazda USA is running into very big problems on this, they are aware - Canada they have not made a decision on this topic yet.
If you think its rock chips or just, say hey only a couple of dings - You need to think again. Its going to get worse.
So please see your dealership asap, also contact Mazda Warranty. - I have owned 2 skyactive modesl3 and 6 never had this much damage to my paint.