Question
Because of work, I am unable to attend morning prayers and therefore cannot recite Kaddish in the presence of 10 men. Is it permissible to recite at home?
Answer
As far as Kaddish is concerned, the purpose of Kaddish is that it be said in public. Without a Minyan (a forum of 10 Jewish males) the Kaddish is not said because it is not fulfilling its intended purpose. I would suggest that you try to say Kaddish as often as you can and ask someone who prays with a Minyan to have the person you are saying Kaddish for in mind when they say Kaddish. This is a common practice in many synagogues.