I posted this in January this year https://www.kia-forums.com/3g-2012-ri...dian-info.html
From Kia Motors America:
NEW YORK, April 12, 2017
– With its eye-catching design and impressive roster of features, the all-new
2018 Rio sedan and 5-door are the latest additions to the world-class Kia Motors America (KMA) model lineup.* Penned at Kia’s European and U.S. design studios in collaboration with Kia’s design base in Namyang, Korea, this subcompact duo will bring an exciting combination of impressive fuel efficiency, innovative technology, advanced safety features4, everyday convenience and fun-to-drive character to value-conscious consumers when they arrive at Kia retailers later this year
IRVINE, Calif., August 28, 2017
2018 Rio sedan and 5-door hatchback are the latest additions to the world-class Kia Motors America (KMA) model lineup.*Delivering a new eye-catching design that is decidedly European, this subcompact duo will bring an exciting combination of fuel efficiency, innovative technology, advanced safety technology4,*everyday convenience and fun-to-drive character to value-conscious consumers when the cars arrive at Kia retailers in the fourth quarter of this year.
all the details, specs and prices as well as photos can be found here 2018 Kia Rio 5-Door Overview
and you can compare it to the G3 2017 model here 2017 Kia Rio 5-Door Overview
IRVINE, Calif., September 20, 2017
— Kia Motors America (KMA) today announced pricing for the all-new
2018 Rio sedan and 5-door hatchback.* Expected to arrive in Kia retailers beginning early October, the subcompact duo will be offered in three trim levels – LX, S and EX
It's been on sale in Canada for a couple of months now (and in Europe) and for Canada and the US it is built at the all new Kia plant in Mexico along side the Forte.