You'll need to use special endings if you want the rall only on the third verse. Something like
.!NoteWorthyComposerClip(2.75,Single)
|Clef|Type:Treble
|Key|Signature:F#|Tonic:G
|Tempo|Tempo:120|Pos:8.5|Visibility:Never
|TimeSig|Signature:Common
|Note|Dur:4th|Pos:-2
|Note|Dur:4th|Pos:-1
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:-1
|Bar
|Ending|Endings:1,2|HideText:Y
|Ending|Endings:3|HideText:Y
|TempoVariance|Style:Ritenuto|Pos:9|Wide:Y|Visibility:Never
|Ending|Endings:1,2,3|HideText:Y
|Note|Dur:4th|Pos:-2
|Note|Dur:4th|Pos:-1
|Note|Dur:4th|Pos:0
|Note|Dur:4th|Pos:-1
|Bar
|Ending|Endings:1,2|HideText:Y
|Ending|Endings:3|HideText:Y
|Tempo|Tempo:72|Pos:9|Wide:Y|Visibility:Never
|Ending|Endings:1,2,3|HideText:Y
|Note|Dur:Whole|Pos:-2
|Ending|Endings:1,2|HideText:Y
|Bar|Style:MasterRepeatClose
!NoteWorthyComposerClip-End