So, bad news time. The Mazda 3 turbo uses what someone inside Mazda called a 6.5 ECU which is different from the Mazda 6 Turbo/Cx9 Turbo, and Cx5 turbo. The older cars have mazdaedit as an option but nothing is available for the new Mazda 3 as a editor of the stock ECU yet.
-Derrick