[f. CHURCH sb. + -LET.] A little or diminutive church.
 
1659.  Gauden, Tears Ch., I. i. 32 (D.). The many defects 
 incident to these 
 little Churchlets and scattered Conventicles.
 
1883.  M. Deane, Quatrefoil, I. ix. 139. Founded by one Clement, who elected himself to be father of a churchlet.