Your father must be "domiciled" in the U.S. when you immigrate under F3. If Petitioner dies there is a process called humanitarian reinstatement but it requires a new petitioner. Contact an experienced immigration attorney to explore all options.
No. Sorry. There is no such waiver.
Behar Intl. Counsel 619.234.5962 Kindly be advised that the answer above is only general in nature cannot be construed as legal advice, given that not enough facts are known. It is your responsibility to retain a lawyer to analyze the facts specific to your particular situation in order to give you specific advice. Specific answers will require cognizance of all pertinent facts about your case. Any answers offered on Avvo are of a general nature only, and are not meant to create an attorney-client relationship.