The Roman Missal states that “in a situation of grave public need, the Diocesan Bishop may permit or order the addition of a special intention” (Roman Missal, The Passion of the Lord, no. 13) in addition to the ten solemn intercessions which are provided for the Good Friday Liturgy.
Sample (Austria Bishops Conference):
(Translations courtesy of Fr. Michael Lewis and Fr. Ivan Montelongo, Diocese of El Paso. Music engraved by Peter Kolar.)