Howe is already without Andrew Surman for the remainder of the season.
The 19-year-old became the first North Korean to score in Serie A last season.
Everton boss has also spoken on the recent incident that saw Barkley punched in a Liverpool bar.
Both midfielders are ruled out for trip to West Brom but could return against Watford on 1 May.
The midfielder has missed recent wins over Swansea and Watford.
Bundesliga giants will visit Santiago Bernabeu on Tuesday following a 2-1 defeat at home.
Foxes lost the first leg of their Champions League quarter-final 1-0 to Atletico Madrid.
They gathered in the Kurdish town of Koya for the match.
Anderlecht face Manchester United in the Europa League quarter-final tie on Thursday.
Alcantara and Vidal are also ruled out while the game could still come too early for Turan.
Hart's loan deal with Torino expires in the summer.
Ibrahimovic is United's leading scorer this season with 28 goals in all competitions.
Dele Alli leads the race for the Young Player of the Season award.
David de Gea was close to completing a move to Real Madrid in 2015.
Cristiano Ronaldo's brace helped Real beat Bayern 2-1 in the first leg of the Champions League.
Sanchez has set his sights on helping Ajax win the Europa League this season.
Dybala has scored 16 goals and assisted a further eight in 36 games in all competitions for Juventus.
Mourinho insists first-choice goalkeeper is not distracted by Real Madrid rumours.
Thomas Tuchel says Uefa behaved 'as if a beer can had been thrown at the bus'.
The Premier League champions beaten as fans clash with police in Madrid.
Marca reports the Athletic Bilbao boss may be tempted to move to the Emirates Stadium.
The 35-year-old rules out short spell at boyhood club Newcastle United.
Dortmund set to play despite bus explosion on Tuesday evening.
James Milner says Reds must "suck it up" amid late season injury crisis.
Lukaku's future is very much up in the air.
Eagles boss reveals an 'impossible' bid to turn down would secure Manchester United flop.
Former Atletico Madrid star has missed the last four games due to a groin injury.
Suspect with 'Islamist links' held after explosion of German football team's team bus.
Dortmund set to play Monaco on Wednesday at 5.45pm.
Italian boss already tried to sign player last summer by launching offer worth £50.9m.