This letter is to inform [you/all of you/etc.] that I will be need to take [a/#] [week/month] long leave of absence to address my
issues. I will be taking the leave on [date] and am expected to return on [date], provided that my
[medical, business, personal, etc.]
concerns have been addressed.
I am confident that my colleagues at [name of organization] will be more than capable to take over my [role/tasks/etc.] while I am away. Thank [you/you all/etc.] very much for your understanding and support at this time. I feel relieved knowing that I will be leaving everything in good hands.
I wish [you/all of you] best wishes. I look forward to seeing you soon.