1. Not anticipated
   "unforeseen circumstances"
   - unanticipated, unlooked-for, out of the blue

See also: unexpected

• nonopening
• nonoperational
• nonoscillatory
• nonparallel
• nonparametric
• nonparametric statistic
• nonparametric statistics
• nonparasitic
• nonpareil
• nonparticipant
• nonparticipation
• nonparticulate
• nonparticulate radiation
• nonpartisan
• nonpartisanship
• nonpartizan
• nonpasserine
• nonpasserine bird
• nonpayment
• nonperformance
• nonperiodic
• nonperson
• nonpersonal
• nonphotosynthetic
• nonphysical