Interrupting naafil prayer and naafil tawaaf in order to offer the funeral prayer
Question

                Can naafil prayer or tawaaf be interrupted in order to offer the funeral prayer?.
Praise be to Allah.
    The Prophet (blessings and peace of Allaah be upon him) said: 
    “When the iqaamah (call immediately preceding the prayer) is given, there 
    should be no prayer except the obligatory prayer.” The apparent meaning is 
    that a naafil prayer cannot be interrupted except for the obligatory prayer, 
    so it should not be interrupted for the funeral prayer, but if the 
    worshipper interrupts it, there's nothing wrong with it, because it is 
    permissible to interrupt a naafil prayer for a valid purpose. 

    Similarly, the one who is doing a voluntary tawaaf may 
    interrupt his tawaaf in order to offer the funeral prayer, but it is better 
    not to interrupt it. End quote. 

    And Allaah knows best.