Is it permissible to pray the funeral prayer alone, separate from the rows?

Question:
Do you not see that many people pray the funeral prayer in the Haram alone, not in a row, even though there is space in the row?

Answer:
No, it is not permissible for a person to pray alone behind the rows. This applies to the funeral prayer and to any other prayer. It is not permissible for a person to stand alone behind the rows. He must join the row. The Prophet (peace and blessings be upon him) said, "There is no prayer for one who stands alone behind the rows." He (peace and blessings be upon him) saw a man praying alone behind the rows and ordered him to repeat the prayer. Therefore, it is not permissible for a person to stand alone behind the rows, whether in the funeral prayer, the obligatory prayer, the tarawih prayer, or any other prayer.