How to say funeral leave is more appropriate

Use formal address, explain the reason and communicate in advance.

When you ask for leave, show them respect first. Use a formal title to explain the reason for the leave. Communicate with leaders in advance before taking leave, so that they have enough time to make arrangements.

For example: good leadership, I need to take time off for family reasons, and my relatives have passed away, so I need to take time off for 3 days to deal with related matters.