Dassemblée
Dassemblée is not a widely recognized standalone term in French or English. In standard use, the sequence d'assemblée appears as part of larger noun phrases and is normally written as de l'assemblée or within fixed expressions. When seen as a single word, it is usually a typographical variant, a misspelling, or a stylized brand name rather than a distinct concept.
Etymology and form: The term derives from the preposition de, which contracts to d' before a vowel,
Usage and context: Legitimate combinations include phrases such as résolution d'assemblée (an assembly's resolution), compte rendu
See also: Assemblée, Assemblée nationale, de l'Assemblée, d'assemblée in compound nouns, branding and proper-noun usage.
If you had a particular context in mind—such as a specific country, document, or work of fiction—providing