365 days visit visa

Assalamwalekum.
My wife is came on 365 days visit visa from India ... But because of some home problem she needs to leave KSA, before completion of 90 days and we are not renewing her visa because she will leave before completion of 90 days stay ... ... So I would like to ask
1)can she will return  again to KSA on same visa?
2) how many days she can stay in India for return to Saudi?
3) is there need of exit reentry paper ?

If it is a multiple entry visa (which it should be) she can leave and enter any number of times and on the same visa till its validity is over.

No need of any exit re-entry papers for people on visit visa

If my wife(1 year multiple entry visit visa) leave without renewing after 90 days and come back again with same visa, is it possible to extend/renew after 90 days of second arrival?