Can a person who has incontinence pray with the congregation?
Question

                A man in my family is suffering from incontinence. Does he have to pray in congregation with the imam or should he pray on his own?.
Praise be to Allah.
    If a person is suffering from urinary incontinence, one of 
    the following two scenarios must apply: 
1 – It is continuous and 
    does not stop for long enough for him to do wudoo’ and pray. In this case he 
    must clean himself and use something to stop the urine spreading. He should 
    do wudoo’ after the time for the prayer begins, then pray with the 
    congregation like all other people. But if he is afraid that he may 
    contaminate the mosque, it is not permissible for him to enter, and he 
    should pray at home, in congregation if possible, or on his own. 

    Ibn Qudaamah said in al-Mughni (1/201): 
As for the woman who is 
    suffering from istihaadah (non-menstrual vaginal bleeding), her case is like 
    that of one who is suffering from urinary incontinence. They may stay in the 
    mosque and pass through it if there is no risk of contamination of the 
    mosque, because it was narrated from ‘Aa’ishah that one of the wives of the 
    Messenger of Allaah  (peace and blessings of Allaah be upon him) 
    observed i'tikaaf with him when she was suffering from istihaadah. She used 
    to see red and yellow discharge, and sometimes she would place a bowl 
    beneath her when she prayed. Narrated by al-Bukhaari… If there is the fear 
    of contaminating the mosque, then he should not pass through the mosque, 
    because the mosque should be protected from that, as it should be protected 
    from people urinating in it. If the menstruating woman fears that the mosque 
    may be contaminated as the result of her passing through it, then she should 
    not do that. End quote. 

    Al-Nawawi said in al-Majmoo’, 2/177: 

    It is haraam to bring any impurity into the mosque. As for a 
    person who has any impurity in his body or is wounded, if he fears that the 
    mosque may be contaminated it is haraam for him to enter, but if there is no 
    such risk it is not haraam. The evidence for that is the hadeeth of Anas 
    (may Allaah be pleased with him), according to which the Messenger of Allaah 
     (peace and blessings of Allaah be upon him) said: “These mosques are 
    not for urine and filth, rather they are for the remembrance of Allaah 
    (dhikr) and recitation of Qur’aan,” or as the Messenger of Allaah  
    (peace and blessings of Allaah be upon him) said. Narrated by Muslim. End 
    quote.

     2 – If the emission stops after a while for long enough for 
    him to do wudoo’ and pray, such as if he knows that after relieving himself 
    the emission of urine will stop after an hour – for example. In this case he 
    should delay praying until the time when the urine will stop, even if that 
    leads to him missing the prayer in congregation. In that case he should pray 
    with his family if possible, so that he may attain the virtue of praying in 
    congregation.  

    The scholars of the Standing Committee were asked: There is a 
    man who is suffering from incontinence, but he remains pure for a while 
    after urinating. If he waits for the incontinence to stop, the prayer in 
    congregation will be over. What is the ruling? 
They replied: If he knows 
    that the incontinence will end, it is not permissible for him to pray whilst 
    this problem is with him, seeking the virtue of praying in congregation. 
    Rather he has to wait until (the incontinence) ends, then he should clean 
    himself, do wudoo’ and pray, even if he misses the prayer in congregation. 
    But he should hasten to clean himself and do wudoo’ after the time for 
    prayer begins, in the hope that he will be able to pray with the 
    congregation.

    End quote. 

    Fataawa al-Lajnah al-Daa’imah, 
    5/408. 

    See also question no. 50075 and 
    39494 
And Allaah knows 
    best.