I wouldn’t need three years off to regain my composure, a few days/weeks would be enough.
For delicate calls or difficult moments I would take them privately. I would remain out of sight until I felt sufficiently confident I could manage my personal life at work.
I’d have a therapist that I would see at lunch times.
If I still couldn’t cope, I would have to resign, in my line of work no one can cry or show personal emotion, so I would need to switch careers. This would the case for many other professions that rely on laser precision and focus - due to the impact on other people’s lives and their outcomes. I would consider government ministers to be in that bracket along with defence.
A high degree of composure is expected and required in many professions. We can’t all be emotionally incontinent.