Family Medical Leave Act (FMLA)
尽快回去。不要等到最后。人活着时的陪伴,对家人很重要。
工作请假请看以下政府 fact Sheet. Under Family Medical Leave Act, if you meet the requirement, you are entitled to have up to 12 weeks unpaid leave to care for a family member for serious illness. Human Resources will not give you problem. it is the law. You need a doctor's note for your mother stating her illness. hope this helps.
https://www.dol.gov/whd/regs/compliance/whdfs28.pdf