Hampshire drew their opening friendly of the season after rain hampered progress on day two at the Ageas Bowl.
Jimmy Adams and Lewis McManus struck half-centuries as the hosts reached 127 without loss in their second innings before stumps were drawn.
Sussex had earlier declared on 356 for eight from 75 overs – with Ben Brown completing a century.
Only 60 overs were possible on day two after rain delayed the start and the captains agreed to split them evenly – 30 apiece.
Both sides had batted for 45 overs on the first day – with Sussex reaching the close on 206 for five in reply to Hampshire’s 127 for six declared.
The south coast neighbours will now head to Hove for another two-day friendly, which begins on Thursday.