Can I still collect widows pension if I remary before the age of 60 and get a divorce 3 years later? Is there any penalty if so?

Hi. Yes, as long as you're unmarried at the time you claim widow's benefits, you can qualify for benefits provided that you meet the other requirements (https://www.ssa.gov/OP_Home/handbook/handbook.04/handbook-0401.html). There's no penalty for a subsequent marriage as long as that marriage has ended.

Best, Jerry