Is there any problem if i decline many call interviews?

Is there any maximum limit for declining shortlisted interviews. Till now due to my busy schedule i alreday declined 2 interview calls.

The interview calls that you receive is based on the underlying algorithms in elitmus based on your pH score. If you aren’t interested in getting any calls for interviews, do not apply for the jobs in the first place.
Always consider an ethical approach even if you do not intend to appear for the Interviews.

after shortlisting there is option of accept and decline. So in that case if i cant able to attend interview due to some reason should i decline or leave that as it be. that i want to know what is more ethical way either declining or leave without doing any action.