Can I have three majors in college? ( Dance, theatre, and Music production)?

No, most universities do not allow a student to take 3 majors.

and if they do you would never get done in four years with these 3 majors. You would be paying for at least a fifth year, if not a sixth too, of college to finish all requirements.

dance and theater majors have a ton of work outside of the classroom. Besides all your academic work, you have rehearsals and performances. You can be require to participate in one performance each semester - on stage or back stage. this eats up a lot of your time.

You must audition for the dance/theater department in order to major in dance or theater. Plus be accepted academically.

Do not assume these two majors are not academic work. You have papers to write, assignments to do, tests to take. It is not just going to be going to dance class.

Many dance and theater majors start taking classes in their major as freshman. PLUS your general educational classes. You can be taking 16-18 credits each semester

You need to look around at different universities. A university near me has a major in musical theater. Each is different.