@yumn190086 , the options for you unfortunately are not many :
(a) wait patiently and hope you do not run out of your visa or have to leave the country on emergency
(b) if you are near a town where there is a federal building ( in most major cities ), there would be an IRS office there. Go visit them and politely bug them -- they can often help in tracing the missing passport.
(c) If none of these yield results and you cannot wait any longer ( like an emergency ), request your country's consulate t issue you a new passport ---- old one lost and need to be cancelled -- and then with the new one in hand visit the DHS -- ( Immigration ) and ask for the visa to be re-issued because IRS lost your passport. But this is last resort.
BTW --- I do not understand why you did not send your husband's passport for the issuance of the ITIN for him -- usually that is what is needed. This does not make sense . Why is he having to pay taxes when he is abroad ( and may be no connection to US sourced income. Please clarify
On rereading your post , you say your passport is US-- then how do you get his visa or your visa on it ? None of this makes any sense ---PLEASE EXPLAIN the situation.
pk
