Spanish phrase
No estoy seguro de ~.
Meaning
I'm not sure if ___.
When to use it
Expresses doubt about whether something is true. Often used politely to signal uncertainty about plans, arrangements, or facts.
Example dialogue
No estoy seguro de si puedo ir.
I'm not sure if I can go.
Está bien, avísame cuando sepas.
Okay, let me know when you know.