Legal Question in Family Law in California

You can't marry a man who is married to someone else, regardless of what country he is from, until he obtains a lawful divorce. Your marriage to a man who is married to someone else, is void, on the grounds of bigamy, in all 50 states, including Utah.

Whether he can divorce a woman in the US, depends on facts that you don't provide, such as whether the woman lives here, or in Guatemala. If she lives in Guatemala, you need to repost your question to an attorney licensed to practice law in Guatemala.