https://www.gamespot.com/articles/luigis-mansion-3-announced-for-nintendo-switch-wil/1100-6461760/

Nintendo has announced it is developing a third entry in the Luigi's for Nintendo Switch. The game made its debut at the very start of today's Nintendo Direct presentation, where a very short teaser was shown, along with a 2019 release date. The name, Luigi's Mansion 3, was listed as a working title. No further details were provided about the game.

The last Luigi's Mansion title was Dark Moon, which was released for the Nintendo 3DS in 2013. The game received a 6.5, with reviewer Carolyn Petit describing it as a"mostly pleasant game marred by the possibility of moments so frustrating, they threaten to overshadow the entire experience."