import re


def get_uninterpolated_placeholders(string):
    """Check if a string has any remaining uninterpolated values.

    Args:
        string (string): String object.
    
    Returns:
        list : List of uninterpolated values.
    """
    # Regex to find matches
    matches = re.findall(r'%\(([a-zA-Z0-9_-]+)\)s', string)

    # Convert to set to remove duplicates, convert back and return
    return sorted(list(set(matches)))