Multiple Family Visit Visa

Hi

My family is in Riyadh now and and they are 1 Year Multiple Visit Visa, after 2nd extension of Visa( valid upto 20th march 2019), i want to send them back to India now for 2 weeks only due to some emergency.

so this extension will cancel or continue ?

You have posted this on the Bahrain forum and not the Saudi forum.

And from your question, I assume you are talking about extension of stay beyond the days mentioned on the visa e.g. 30 days on visa which can be extended up to 180 days.  If that is the case, then keep in mind that this extension of stay is PER entry into the Kingdom.  Once they exit, this extension becomes invalid.   But if the visa is valid, they can enter again and you can then apply for another extension.