Is it rude to sneeze in mealtime? I mean Sneezing can come at anytime right?

Its only rude if you don't COVER YOUR FUCKING MOUTH

It's not rude at all.Ive never seen anyone at the table,that didnt cover there mouths.

Just cover your mouth so you don’t gross anybody out.

sneeze into your elbow and no problem

It can't be helped, but covering one's mouth, preferably with a napkin, is the polite way to handle it.