Sub: Request Letter for Asking Unpaid Leave
Sir, this is (Name) and I am an employee in the Sales department (Job position with department name). I have been working at this company for the last 2/3/5 years. I have had the honor of working alongside you that has made me even more skillful than I ever was.
You might be aware of the fact that my mother had been very sick last month and I had to go and take care of her because of which the limit of my allowed vacations reached. However, the doctors have informed me today that her situation is very critical for that I have to go and take care of her. For that purpose, kindly grant me unpaid leave for 3 weeks (as your requirement) starting from (Date) to (Date). I wish to continue working for you as soon as the well-being of my mother is ensured. Thank you for your kind attitude.