Perth: West Indies ended the fourth day on 308 for nine, needing another 51 runs for an unlikely win at the end off fourth day of the third and final Test at the WACA.
Deonarine (82) and Nash (65) added 128-runs for fourth wickets, but after Deonarine bowled by Watson, Windies collapse.
Australia were one wicket away from a series-clinching win as West Indies ended day four on 308-9 in the third Test in Perth.
The home side were granted a half-hour extension of play by the umpires but were unable to finish the job.
Narsingh Deonarine (82) and Brendan Nash (65) shared a stand of 128 as they chased a target of 359.
But only last-wicket pair Kemar Roach and Gavin Tonge remain, with 51 still needed on the final day.
They survived the last six overs, adding 29 runs with Roach 13 not out and Tonge on 12, but it would be a massive surprise if they managed to steer their side to a victory which would see the series shared 1-1.
Travis Dowlin (22), Chris Gayle (21) and Ramnaresh Sarwan (11) fell in the first session after the visitors bowled out the Aussies for a paltry 150. However, that still left the West Indies a steep 359-run target to chase in two days.
Earlier, the West Indies removed the remaining two Aussie wickets for 13 runs. Dwayne Bravo took four wickets in the second innings.
West Indies have managed to survive the late burst of quick bowling after Australia ran through the middle order and took the extension to try and finish things off today.
They finished one wicket short and West Indies have reached 308/9, needing another 51 runs to win.
It will be a matter of time before it's all over tomorrow morning unless Gavin Tonge and Kemar Roach can pull off a miracle to complete a huge win for the visitors.
Australia lead three match Test series 1-0.
Australia: 520 for 7 dec & 150 (Bravo 4-42)
West Indies: 312 & 308 for 9 (Deonarine 82, Nash 65)
Status: West Indies need 51 runs to win