I'm horrified by so many of the comments here that seem to lack even the most basic of human decency. Allow me to fill people in for those who have never uprooted your life and moved across the world for a job. It is a massive commitment on the part of the employee, where you sell the majority of your earthly possessions, property, cars, etc. Then you go through an immigration process which even if its handled by FAA…
This is crazy entitlement. Three months salary in a tech job is more than most people make in a year. If you are moving overseas, maybe wait before selling all your stuff until you pass probation. This idea that you should be guaranteed three months is so backwards. You are on trial. Tell me anyone’s advice that goes “we should fire slow, hire fast”.
Your partner also quits their good job. That good job might not be available if you come back, congratulations, you're back at years of job hunting and job hopping to be where you were years before. In the new country maybe this was not a concern and the other partner who was just laid off had a great salary to cover.
Your kids leave their good school. Now that school no longer accepts applicants and you're stuck with whatever you can find on a short notice.
This list is far from comprehensive.