Personally I find it very hard to stay on point with my diet when I'm not able to train for an extended period of time. It's just the way I am but certainly doesn't mean you can't do it.
Keeping a higher percentage of your calories as protein should definitely help you maintain. Try to some type of training even if its just body weight exercises to keep those muscle fibers active.
I would lower my calories too since you won't need the same amount as when you are able to train as normal.
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