Manchester United midfielder Donny van de Beek has missed out on Euro 2020.
The Netherlands star was expected to be in their squad for the tournament, despite an indifferent first season with the Red Devils.
However, the creative talent is struggling with an injury that has been troubling him for one or two months.
Per the Dutch team's official Twitter account, van de Beek is out of the squad.
Asked about the matter, De Boer told reporters: "It is always sad when boys have to drop out injured.
"To join the group at this stage is not exactly ideal.
"We are two weeks on the road, I don't like that. I also have enough midfielders in my roster to absorb it.
"Of course there can always be a situation where you decide differently, but at the moment I prefer to leave the group as it is."