How do players withdraw from an international squad?

Cole Palmer has withdrawn from England's squad for their upcoming matches in the Uefa Nations League across September and October [Getty Images] England announced that five of their players withdrew from their squad for injury reasons on Monday, with Declan Rice, Cole Palmer, Marcus Rashford, Kobbie Mainoo and Tino Livramento all dropping out. There is no formal process for withdrawing from an international squad outside of a major tournament. BBC Sport understands that the Football Association allows players to withdraw from England squads following a conversation between the medical departments of the player's club and that of their national side. Medical assessments are also often carried out by both parties. It is believed that other football associations use a similar process, with no standardised practices in place. However, there is a strict process in place at major tournaments such as the World Cup or European Championships. In order to withdraw through injury from a final tournament squad, some level of medical proof of injury would be required and must be approved before a player can withdraw. In the same way that there is no formal process for players withdrawing, there is no formal process of adding players to the squad after the initial squad was selected. There is a more formal process at major tournaments , often before the start of that team's opening match for outfield players. Goalkeepers have fewer restrictions due to playing a specialised position. Uefa have no restrictions or regulations in place when it comes to players withdrawing from national squads outside of the finals of a major tournament, with any necessary protocols being at the discretion of each nation's respective Football Association. For the Nations League, all that Uefa require is that nations submit a 23-player matchday squad before 23:59 Central European Time the day prior to the match. That squad must consist of at least three goalkeepers. For the Nations League finals, teams are required to submit squads that consist of 26 players. This article is the latest from BBC Sport's Ask Me Anything team. More questions answered... What are the Premier League rules on yellow card suspensions? How does the Nations League work and who is in each league? How many times has a player scored a hat-trick in a Premier League loss? Why will September international break last three weeks?