Sussex 162 (Orr 36, Coughlin 3-33, Potts 3-53) and 9 for 4 (Raine 3-4) trail Durham 459 for 7 dec (Jones 96, Maddinson 90, Borthwick 82, Benjamin 82*) by 288 runs
Durham took one wicket at Seat Unique Riverside before rain intervened to halt their charge for victory against Sussex and take the game into the final day.
On a day which only saw 14 balls delivered, Ben Raine still found time to pin Dan Ibrahim lbw for a duck before showers ended the session and eventually the day after just 10 minutes of play, Sussex adding three runs to their overnight score to be 9 for 4.
The inclement weather continued to keep the players off the field when eventually the umpires called the close at 3:40pm local time, with the visitors still 288 runs behind and likely needing to bat the final day out to rescue a draw.