can I remove my husband from application for sibling immigration application

You may be able to withdraw your husband’s co-sponsorship by communicating with the agency which is holding your sibling’s application at this time. I do note, however, that the NVC and consulates are sometimes reluctant to continue processing cases where a spouse does not put in the I-864 A form. This may be because the agencies want to see more of a level of support, want to see the whole picture of the petitioner’s ability to support, because there are mixed assets belonging to both parties, or for other reasons. So you can make the request, but there may be some resistance. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.