Hard to tell... Depends on how you look at things.
Let's say a level is divided into 4 Parts... The first three being sneaking and approaching , then the last part has you kill 3 targets...
Do you consider only the last part ot be an assasination ? Do you consider the last part to be 3 assasinations ? Do you consider the approach parts/escape parts to be devoid of assasinations ? If the kill occurs in a cutscene, is it still an assasination ? Likewise, if a mission like Attack of the Saints have you kill like 8 targets in a quick succession, does this end up evening up for the levels where you kill no one ?
To me , a "Level" is the sum of each parts... With that way of looking at things, most levels have at least one assasination going on... Although there are sneaking segments without any mandatory kill. I also don't really care about not killing targets for two reasons :
1 - I can kill pretty much anyone I want anyways... So if I feel like killing any random guy, I can. 2 - If I absolutely want to have targets in every single part of the game, I can play or create custom contracts... So who cares if there's no target in that particular part... Just make a contract and choose a cool target... --- The wind carried screams from the west. I could not help but smile - Kain PSN/MGO ID : Stealth_Cobra | MGO Character : Stealth_Viper