Not long ago, UK Tabloid news, The Mirror, wrote a rumour about a demo for FIFA 18 coming to the Nintendo Switch. Unfortunately, it seems that it is not meant to be.
According to Dream Team FC (link), it seems like there will not be a demo for the Nintendo Switch version of the game, meaning that the only way to try it will be to head down to the physical stores or purchase the full game.
EA confirmed exclusively to Dream Team Gaming that the demo will not be coming to the Switch.
FIFA 18 for the Nintendo Switch launches on 29 September 2017