Specifically recognizes and binds N6-methyladenosine (m6A)-containing RNAs, and regulates mRNA stability (Probable). M6A is a modification present at internal sites of mRNAs and some non-coding RNAs and plays a role in mRNA stability and processing (Probable). Required for the correct timing of leaf formation and normal leaf morphology (PubMed:29643069). Required for proper trichome branching and morphology (PubMed:29643069). Functions redundantly with ECT2 (PubMed:29643069). Expressed in the shoot apex, at the sites of leaf formation, and in emerging leaves. Aberrant trichome branching with an increase in number of spikes (PubMed:29643069). The double mutant plants ect2 and ect3 exhibit delayed timing of leaf formation and altered leaf morphology (PubMed:29643069).