We classify AdS3 solutions preserving N = (8, 0) supersymmetry in ten and eleven dimensions and find the local form of each of them. These include the AdS3×S6 solution of [1] and the embeddings of AdS3 into AdS4×S7, AdS5×S5, AdS7/ℤk×S4 and its IIA reduction within AdS7. More interestingly we find solutions preserving the superconformal algebras f4,su(1,1|4),osp(4∗|4) on certain squashings of the 7-sphere. These solutions asymptote to AdS4×S7 and are promising candidates for holographic duals to defects in Chern-Simons matter theories.