I am having a filter on one dimension which has 10 options.

 I am using only 3 options in the report and want only those 3 options to be shown to the user in the filter. But when I show filter all 10 values are showing

This is a common issue. To solve this, we can create a set with those 3 values of that dimension and then can use that set as a filter that can solve your problem.

Make sure to select show members in set show that members of these sets will be shown in the members.