Mario Kart Tour delayed to summer 2019 - Polygon

Mario Kart Tour, Nintendo’s next smartphone game, will launch sometime this summer. Originally planned to make it to Android and iOS by March 31, the mobile version of Mario Kart requires extra development time, according to Nintendo.

Mario Kart Tour Initial Release, September 25, 2019

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Mario Kart Tour delayed to summer 2019 - Polygon

Mario Kart Tour delayed until Summer 2019

Smartphone version of Mario Kart delayed until Summer 2019

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Mario Kart mobile delayed until summer 2019

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Summer Festival Tour, Mario Kart Tour Wiki