If this is hypothetical, then the answer would not be realistic.
In some countries, people are so afraid that they convince themselves that they will be jailed if they don’t shave. When you look around, you see a lot of the people growing their beards. This is imaginary and it is not permissible for him to shave.
But if this is true and people are prosecuted for growing their beards and they will go to jail, it is then permissible to shorten it to the limit they allow it and this person has to try hard to immigrate and make hijrah from this country as it is not safe to worship Allah in it.