If you're applying for a US visa and have a divorce case that's been ongoing for years, it's generally not a concern for immigration unless there are criminal charges. You can usually proceed without mentioning the pending divorce. However, accurately stating your marital status on the form is important. Options like 'Divorced', 'Legally Separated', or 'Other' are available, and it's best to choose the one that most honestly reflects your situation, even if a final decree hasn't been issued.