What is the proper method of combining Maghrib and Isha due to rain, according to the Maaliki Math -hab?

Answer

When it is pouring heavily, then according to the Maaliki Math-hab, Maghrib and Isha may be combined in Maghrib time only in the Musjid, not at home. First the Maghrib Athaan will be proclaimed as usual. After the Athaan there will be a pause for the duration of three raka'ts. Then Iqaamat followed by the Maghrib Fardh will be performed. Thereafter, the Isha' Athaan will be recited inside the Musjid, not from the Minaaret. This Athaan will be recited in a suppressed voice, not like the usual loud Athaan. Sunnat and Nafl Salaat will not be performed between Maghrib and Isha. After the Athaan will be the Iqaamah and Isha' Fardh.

It is not permissible to perform Witr immediately thereafter. Witr has to be performed in its proper time.