I think it kind of depends on the situation which translation should be used, but I would agree that 对不起 could, depending on the situation, translate to "pardon," "sorry," or "excuse me." In this sentence I don't think that "excuse me" would be the best option simply because I would typically only use "excuse me" when interrupting somebody, but I suppose without context we don't know whether the 对不起 is being used to interrupt someone or not.