How can i have my parents and sibling to come to USA since i became a citizen and my parents and siblings had a case in 2010 which was refused?????

The danger or risk of being refused again depends upon over the grounds of refusal in 2010. If the refusal was based on fraud or misrepresentation, that might be a cause of concern again. If the siblings were under 16 at the time of the refusal, they would most likely not be penalized by the sins of the parents. In order to file for parents and siblings, you would have to file separate petitions for all of them. The fact that one of your siblings is married has no effect upon a sibling petition. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (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.