Midfielder Adrien Silva has returned to Portugal as Leicester continue to wait on his availability.
Portugal international Silva is not allowed to train with the club after FIFA blocked his £22 million switch from Sporting Lisbon because his documentation was received by the FA 14 seconds after the deadline.
Leicester have yet to hear whether the transfer will be ratified, and Silva will continue to be missing when they host Liverpool in the Carabao Cup on Tuesday.
The 28-year-old has trained with the fitness coaches as the club formalise an appeal but has returned home for now.
Boss Craig Shakespeare said: "He has gone back to Portugal for the time being.
"He is an expecting father so he spent a bit of time with his family at the weekend. Then we will see what the process brings from now on.
"The conversations I've had with him so far are very brief but of course in the back of his mind the World Cup will be a concern. But I think he is more interested in finding the right solution for here and now."
Meanwhile, star striker Jamie Vardy is a major doubt after coming off in Saturday's 1-1 draw at Huddersfield.
Vardy, who scored the equaliser from the spot, may not play with Liverpool due to return to the King Power Stadium in the Premier League on Saturday.
Shakespeare said: "Jamie hasn't trained, we'll give him every opportunity. He has a tight groin and he has had continuous treatment since. He won't be one to risk, so we'll assess it tomorrow."