Around 1:20 p.m. (Rome time) the Vatican Press Office stated that “since it has not been delivered, the homily does not exist.” As to whether any additional explanation will be offered, the answer has been: “no.”
In it bulletin On this Palm Sunday, the official means of the Vatican Press Office to report on the activities of the Pope, the following was published around 2:00 p.m. (Rome time): “At the end of the proclamation of the Passion of the Lord, according to Marco, there was a moment of silence and prayer before resuming the celebration.”
UPDATE: The statement from the Vatican Press Office on Pope Francis’ homily on Palm Sunday has been added to this article, as well as what was reported in today’s bulletin.