Unofficial exclusion from private school

[Ramanama]

My daughter, age 14 has ADHD and has always had attention and focus problems. She is impulsive and doesn’t think before she acts. However, she has been absolutely thriving at a private boarding school with tiny classes. Her behaviour is mostly good and her academic progress is also good. She is friendly, confident and has lots of friends. Suddenly, 2 weeks ago we started on a rollercoaster of detentions and threats of escalating punishments (for minor transgressions all attributable to her ADHD symptoms).
We have now been asked to remove her for a ‘cooling off period’. This was done in a very cruel way and her and her friends are devastated. We have a meeting planned to discuss if she has a future at the school. She is broken-hearted as she loves the school and doesn’t want to move. The school hasn’t mentioned official suspension or expulsion. We are all very shocked and don’t know what to do next. It’s so hard to see her so unhappy.

Private schools can do whatever they like.
Unless the pupil is there on an LA funded statement place

This isn't going to go down well but if your dd is causing low level disruption then a private school is less likely to put up with behaviour that is detrimental to the other pupils' education as the others will walk away and go elsewhere if they feel they are not getting their money's worth. As a parent if another child was interfering with your child's education what would you expect to happen.

It sounds as though they have attempted to adjust for dad's adhd but that her behaviour is not at the required level and as a pp stated unless there funded by an L.A. they are under no obligation to keep her.

Does she understand what is expected of her in terms of behaviour? Is her confidence leading to silliness to show off to friends or are her friends egging her on?

I saw this happen at not a school, but at a sports club. One child had ADHD, and I think instructor was trying hard to keep him. But once others started to leave because of the child's behavior, they had no choice but let the child go. After all, they are profit making organization.

What happened two weeks ago?
Has something triggered her, or is it they're taking a harder line or what?

Was there a big incident that started them thinking they couldn't deal with her?

It would be strange to go from absolutely fine to "cooling off period" in a fortnight unless there's something else.