deferred prosecution and immigration

Is deferred prosecution considered a conviction for immigration purposes? Entered into such a program for misdemeanor shoplifting. My plea was "not guilty"( and at no point did I plea or sign anything to the contrary). Terms of agreement were to remain law-abiding for one year after which case would be dismissed (Now have certified copies of disposition showing charges dismissed) .No probation was involved (unless the terms of the agreement to remain law abiding can be considered probation), no fines were imposed. Just had to pay court costs. Would this pose any problem in applying for future immigration benefits? The charging statute in this instance is misdemeanor with max penalty which could be imposed of 6 mos. I am a long time lpr with no "blemish" other than this