Question
Should an Avel say Kaddish if they are:
1.) Asked to make a Minyan but already davened this Tefila.
2.) Not needed to make the Minyan but present when 10 are davening and Kaddish is being said.
3.) Arrives at the end of a Shiur when Kaddish Rabbanan is being said, and did not attend the Shiur.
Answer
1+2) In the first two cases you can either say a couple Pirkai Tehilim or daven the end of the davening with the Minyan.
3) If you did not attend the Shiur you can not say Kaddish.
Rabbi Yitzchak Grinblat.
