feel a lump in one's throat, feel blocked

I feel a lump in my throat.

私は胸が詰まります

I feel a lump in my throat at the graduation ceremony.

私は卒業式で胸が詰まります

I feel a lump in my throat when I read my friend's letter at the graduation ceremony.

私は卒業式で友達の手紙を読んで胸が詰まります

I suddenly feel a lump in my throat when I read my friend's letter at the graduation ceremony.

私は卒業式で友達の手紙を読んで突然胸が詰まります

I suddenly feel a lump in my throat for a while when I read my friend's letter at the graduation ceremony.

私は卒業式で友達の手紙を読んで突然しばらく胸が詰まります