The Dodekanisos Pride is believed to be unwell. At least, all sailings have been cancelled until further notice, and she's been removed from the booking system until 7th September.
The Express and Panagia Skiadeni are operating normally.
In practice this means that the sailing on Sundays which leaves Rhodes late morning, calls at Symi and continues up the line to Kos, Patmos, and eventually Samos is cancelled. Likewise the Friday sailing from Samos to Patmos, Kos and Rhodes calling at Symi at 13:30. The voyages on other days have gone too, but they don't come near Symi anyway, as nearly all this year's service for Symi is by the other two ships.