I had heard once that there was an omitted/deleted part of Sefer Yonah after Hashem's response to Yonah about the kikayon. Is this true? Is there a source for this idea?
"Let My Nation be Warned" explains that this is why we throw in three pesukim from Michah at the end of the Haftarah. Although this is the end of the Sefer, those three pesukim were Yonah's response.
There's a midrash that Yonah responds to God, effectively -- "I submit. You do with the world as You see fit."