An inflectional suffix is sometimes called a desinence.
From the en.wikipedia.org
At least one study has sought to analyze the category of negative informal contractions as the attachment of an inflectional suffix.
From the en.wikipedia.org
The inflected nouns in the table are in the absolute singular form with the inflectional suffix and any reduplicant separated from the initial noun stem with hyphens.
From the en.wikipedia.org
The weakening also affected the distinction between the indicative and subjunctive moods, which had largely been determined by the vowel of the inflectional suffix in Old Dutch.
From the en.wikipedia.org
They are used even when the inflection of the stem can be determined by a following inflectional suffix, so the primary function of okurigana for many kanji is that of a phonetic complement.