One of the singular values is 0 if and only if one column is a linear combination of the other two columns.
[-1+1j -1j -1+1j; -1+1j 1-1j -1+1j; -1j 1+1j -1j; 1-1j -1j 1-1j] 4 2 0 [ 1+1j 1 1 ; -1 -1+1j -1+1j; -1+1j 1-1j 1-1j; -1 1+1j 1+1j] 4 2 0 [ 1-1j -1-1j -1 ; 1j 1 1-1j; -1+1j 1+1j 1 ; 1-1j -1-1j 1+1j] 4 2 0 [-1-1j -1j 1+1j; -1+1j -1-1j 1-1j; 1-1j -1 -1+1j; 1 1+1j -1 ] 4 2 0 [ 1-1j -1+1j -1+1j; -1 -1-1j -1j; -1-1j 1+1j 1+1j; 1j -1+1j -1 ] 4 2 0 [ 1j 1-1j 1+1j; -1j 1+1j -1+1j; -1+1j -1j 1 ; 1+1j 1-1j 1+1j] 4 2 0 [ 1-1j 1+1j -1j; 1-1j 1+1j -1j; 1+1j -1+1j -1-1j; 1j -1 1-1j] 4 2 0 [-1-1j 1 -1j; 1+1j -1-1j -1+1j; -1j -1+1j 1+1j; -1 -1-1j -1+1j] 4 2 0 [-1-1j -1+1j 1-1j; -1j 1+1j -1j; 1-1j -1-1j 1+1j; -1 1-1j -1 ] 4 2 0 [-1-1j -1 1 ; 1+1j 1 -1 ; -1-1j -1+1j 1-1j; -1-1j 1+1j -1-1j] 4 2 0 [ 1-1j 1j -1-1j; -1-1j -1 -1+1j; -1-1j -1+1j -1+1j; 1j 1-1j 1 ] 4 2 0 [ 1+1j 1-1j 1-1j; 1+1j 1 1-1j; 1-1j -1j -1-1j; -1 1-1j 1j] 4 2 0 [ 1-1j -1 -1+1j; 1+1j -1 -1-1j; 1-1j -1+1j -1+1j; 1 1-1j -1 ] 4 2 0 [ 1+1j 1 1-1j; -1+1j 1 1+1j; -1 1-1j 1j; 1-1j -1+1j -1-1j] 4 2 0 [-1+1j -1-1j -1+1j; -1-1j 1 -1-1j; 1 1+1j 1 ; -1-1j -1 -1-1j] 4 2 0 [-1-1j -1-1j -1+1j; -1 -1-1j -1+1j; -1-1j 1 -1j; -1j 1+1j 1-1j] 4 2 0 [-1 1+1j -1-1j; 1-1j 1j -1j; 1 1+1j -1-1j; -1+1j 1-1j -1+1j] 4 2 0
For these, the three columns are linearly independent.
[ 1j -1-1j -1+1j; -1-1j 1 -1-1j; -1-1j 1-1j -1 ; -1j 1j -1j] 4 1 1 [ 1 -1j 1 ; 1-1j -1+1j -1+1j; -1-1j -1j -1+1j; -1j -1 -1j] 3 2 2 [ 1-1j 1+1j 1+1j; -1+1j -1+1j -1-1j; 1-1j 1+1j 1-1j; -1-1j 1+1j 1+1j] 4 2 2 [-1+1j -1j -1 ; -1+1j -1-1j -1+1j; 1j -1+1j 1j; -1j 1 -1-1j] 4 1 1 [-1 1+1j -1-1j; 1-1j -1+1j 1+1j; 1j 1+1j -1-1j; -1j 1+1j -1-1j] 4 2 1 [-1+1j 1+1j -1 ; -1+1j 1+1j -1j; -1+1j 1+1j 1 ; 1-1j 1-1j -1+1j] 4 2 1 [ -1j -1+1j -1+1j; -1+1j 1+1j -1j; -1-1j -1-1j 1-1j; 1+1j -1+1j 1+1j] 3 3 2 [ 1+1j -1-1j -1-1j; 1+1j 1+1j 1-1j; -1+1j 1+1j 1-1j; -1+1j 1+1j -1-1j] 4 2 2 [ 1 -1-1j 1+1j; -1 1+1j -1-1j; -1+1j 1-1j -1-1j; 1 1+1j -1-1j] 4 2 1 [ 1-1j 1j 1+1j; -1j 1j -1 ; 1 1 -1j; -1+1j 1+1j -1-1j] 3 2 2 [ 1-1j 1+1j 1-1j; 1+1j -1-1j 1 ; -1+1j 1j 1-1j; 1-1j 1-1j 1+1j] 3 3 2 [ 1-1j -1+1j -1+1j; -1+1j -1+1j 1 ; 1+1j -1+1j 1+1j; -1j -1+1j -1-1j] 3 3 2 [ 1-1j 1-1j -1+1j; -1-1j -1+1j 1-1j; 1-1j -1-1j 1-1j; 1-1j -1+1j 1+1j] 4 2 2 [ 1 1-1j 1+1j; 1j -1-1j 1-1j; 1 -1+1j -1-1j; -1+1j 1-1j 1-1j] 4 2 1 [ 1+1j -1j -1-1j; 1-1j -1+1j 1-1j; -1 -1+1j -1-1j; 1+1j 1+1j 1-1j] 3 3 2 [-1-1j 1-1j -1-1j; -1+1j -1+1j -1-1j; -1j -1+1j -1+1j; -1-1j 1 -1+1j] 3 3 2 [ -1j 1+1j -1 ; 1+1j -1-1j 1+1j; 1 -1 1-1j; -1+1j 1 1j] 4 1 1 [ 1j -1j 1-1j; -1-1j 1+1j 1+1j; -1j -1+1j 1j; 1-1j 1j 1j] 4 1 1 [ 1-1j 1-1j 1+1j; 1 -1-1j 1+1j; -1j 1-1j -1+1j; -1 -1+1j 1-1j] 4 2 1 [ 1+1j -1 1+1j; 1-1j 1-1j 1j; 1-1j -1-1j -1+1j; 1-1j -1+1j -1-1j] 3 3 2 [ 1j -1-1j -1+1j; 1-1j 1-1j -1-1j; 1j -1j 1 ; -1 -1 -1j] 3 2 2 [ 1-1j 1j 1+1j; -1-1j -1-1j -1-1j; 1+1j -1-1j 1-1j; 1-1j -1-1j 1j] 3 3 2 [ 1+1j 1+1j 1 ; -1+1j 1-1j -1+1j; 1j -1-1j 1-1j; -1-1j -1+1j 1+1j] 3 3 2 [-1+1j 1j -1-1j; -1-1j -1+1j -1-1j; -1+1j 1j -1-1j; -1-1j 1 1-1j] 4 2 1 [-1+1j 1-1j -1+1j; -1-1j -1+1j -1+1j; 1+1j -1+1j -1-1j; -1+1j 1-1j 1+1j] 4 2 2 [-1-1j 1+1j -1+1j; 1+1j 1-1j -1-1j; 1+1j -1 1+1j; -1+1j -1+1j -1j] 3 3 2 [ 1-1j -1-1j 1-1j; 1+1j -1-1j -1 ; -1+1j -1-1j 1+1j; 1-1j -1j -1+1j] 3 3 2 [-1+1j -1 -1+1j; 1+1j 1+1j 1j; 1 1 1 ; -1j -1-1j -1-1j] 4 1 1 [-1-1j -1-1j -1-1j; -1j -1j 1-1j; 1+1j 1 1 ; -1 -1-1j -1 ] 4 1 1 [-1-1j -1-1j -1+1j; -1 -1+1j 1-1j; -1 1-1j -1+1j; -1 -1-1j 1+1j] 4 2 1 [ 1j 1 -1 ; 1+1j 1+1j 1-1j; 1 1j 1j; -1+1j 1 1+1j] 3 2 2 [-1 1-1j -1+1j; 1-1j -1-1j -1+1j; -1+1j -1+1j -1-1j; -1+1j -1-1j -1 ] 3 3 2 [ 1 -1-1j -1-1j; 1j 1+1j 1+1j; 1-1j -1-1j 1-1j; 1 1+1j 1+1j] 4 2 1
Only the first example has a zero singular value, and you will note that $1 + j$ times the first column plus $j$ times the second column equals the third column.
[ 1-2j 1+2j 1 ; 2+1j -2+2j -1+1j; -1+2j 1-2j -1+2j; 1+1j -1 1j] 6 3 0
For the balance of these examples, the three columns are linearly independent.
[ 1-2j -2-1j -1 ; 2 2+2j 2 ; -2-1j -1 -2-1j; 1-1j -1j -2-2j] 6 3 2 [ 2-1j 2j -2 ; 2-1j -1-1j 2+2j; -2+1j 1j 1+1j; -2+1j -2-2j 1j] 5 4 3 [ 2-1j -2+1j -1 ; -2+1j 1-2j 2-1j; -1 2-2j 2+1j; 2j 1-2j 2-1j] 7 2 1 [ 2+1j -2-1j -2-1j; -1 1-2j -2+1j; -2+1j -1 -2+2j; -2 -2-1j -1j] 5 4 3 [-1+2j 2-2j -1j; -1j 1j 2 ; -2j -2-1j 1-2j; 1-1j 2j 1+1j] 5 4 1 [ 1+1j -2j 1+2j; 1+1j 2+2j 2-1j; 2j -2 -1-2j; 1+2j 1+1j 2 ] 5 4 3 [-1 -1-2j -2-1j; 1+1j -1+2j 2+1j; -2j -1j 1-2j; 2-2j 2j 2j] 6 3 2 [-1 2-1j 2+2j; -1 2+1j 2-1j; 2+1j -1+2j 2+1j; 2j 2j 2+2j] 6 4 2 [ 1+2j 1 1j; -2j 2j 1 ; 2+1j 2-2j 1-1j; 1-1j 1 2-2j] 5 4 1 [ 1 -2+2j 2j; 1-2j -2+1j 2 ; 1+2j 1+1j 2 ; 2j 1+1j -1j] 5 4 2 [ 2+2j -1j 2j; -1j -1j 2-1j; 1j 1j -2j; -1-1j 2-1j 2-1j] 5 3 2 [ 2j -2j -2-1j; -2j -1+1j -2-1j; -2+2j -1+1j -1j; -1-1j 2-1j -2-2j] 5 4 3 [ 1-1j -1+2j -2+1j; -1+1j -1+1j 1j; 1+2j 2j 2j; -1+1j -1 -1-1j] 5 3 1 [ 1+1j 2+2j 1-1j; 1-2j 2j 2j; 2-1j 2-1j -1+1j; -1-2j -1 1-1j] 5 4 2 [-1-2j 1-2j 1+1j; -1-2j -1j 1+1j; 1j -1-1j 2j; 2+2j -1-1j -1j] 5 3 2 [-1-1j -1j -1-1j; 2j -2 -1-1j; -1+2j 2j 2j; -1+2j 2j 2-2j] 5 4 2 [ 2+1j 1j -2+1j; -2j 2-1j 2 ; -1-2j -2j 2-2j; 2-2j 2 1 ] 7 2 1 [-1+2j 1-2j -1-1j; -1 1+1j -2j; 1 1-2j -1+1j; 1-1j -1j -2-2j] 5 3 2 [ 1j -1+2j -1+2j; -2+1j -2+1j 1 ; 1+2j -1 -2-2j; -2+1j 2-2j -1 ] 5 4 3 [ 1+2j -1 -2 ; -1+1j -1j 1j; 1j -2-1j -2+1j; -2j -1-2j -2j] 5 3 2 [ 2-2j 2+2j 2+2j; 2-1j -1+2j -1+1j; 2 2 -2j; -1-1j -1+1j -2 ] 6 4 2 [ 1-1j 2j -1+2j; -2j -2-1j -1j; 2-2j -1+2j 1-1j; 2-2j -1j -1+2j] 5 4 3 [ 1-2j 2+2j -2+1j; -1j -2 -2+1j; -1+1j -2 1+2j; 2-1j -1-1j 2 ] 5 4 3 [ 2-1j -2-2j 1j; 1+1j 2j -1+2j; 2j -2-1j 2-1j; -1j -2+1j -1+2j] 5 4 3 [ 2-2j 2+2j 2-2j; -1+1j 2-1j 1-2j; 2j -2 2 ; -2 1+1j -1+1j] 6 4 2 [ 1-2j -1+2j -2j; 2+2j 1j -2 ; 1+1j 2+2j -1+1j; 2j -2+1j 2-2j] 6 4 2 [ 2-1j 1 2 ; -2-2j 1+1j -1-2j; 1j 1-2j -1-1j; 2j -2 2+2j] 6 3 2 [ -1j 2+1j -1 ; 2-1j -1 1j; 1j 1-1j 2 ; 2+2j -1j 2+2j] 5 3 2 [ 2j 1+2j 1-1j; -1+2j 1+1j -2 ; 1+1j -1+1j 1+2j; 1 1+2j 1-2j] 5 4 1 [ 1 -1-2j -2-1j; -2-1j 1+2j -1-1j; 2j -1 -1+2j; -2-2j 2-1j 2j] 5 4 3 [ 1+1j 1-1j 1+1j; 1j 2-1j -2+2j; -1-2j 2-2j -1-2j; 1+1j 1j 1j] 5 4 1 [ 2-2j 2-1j 1-2j; -2j -1j 2+2j; 1+1j -1j -2j; -1-2j -1+2j -1-1j] 5 4 3 [-2 -2+2j 2j; 2-1j 2 2+2j; -1+2j -1+2j 1-2j; -2+1j -2j -2-2j] 6 5 2 [ 2-1j 2-1j 2 ; 2j 2+1j -1-2j; -2j -1-1j -2-2j; 1 -1-2j 2-2j] 6 4 2 [-1 2+2j -1+2j; -1-1j -2+1j 2+1j; 2-2j 2+1j -1+1j; -2 1j -2 ] 5 4 3 [-1 2j 1+1j; 1j 2-1j -2+2j; 2 -1-2j 1+1j; 1+2j 1-2j -2 ] 6 3 1 [ 2+1j -2j -1+2j; -1+2j -2-1j -1-2j; -2 -1-2j -2+1j; -1j 1j -2+1j] 5 4 3 [-2-1j 2 -1-1j; -2-1j -2+1j -2j; -1j -2-1j 2+2j; -2j -2 1+1j] 6 3 2 [ -2j 1+2j -1-2j; 2-1j 2j -1-2j; -1+2j 1-1j 2+1j; 2+1j -2 2-1j] 7 2 1 [-2-2j -1+1j 1 ; -1-1j 2 -1-2j; -1-1j 2+2j -2+1j; -1+2j 2j 2j] 5 4 3 [ 2j -2 1j; 2 2j -1+1j; 1-1j -1-2j 2+2j; -2 2+2j 2j] 5 4 3 [ 1 -1+2j 1-2j; -1-1j -1j 1+1j; -2+1j -1-2j -2 ; 1-1j 2+1j 1+2j] 5 4 1 [-1+1j -2+2j -2+1j; -1-1j -1-1j 1+1j; -2 2-1j 1+1j; -2-2j 1j -2 ] 5 4 2 [-1+2j 1+2j 1j; 1 -2+1j -1-1j; -2+1j 1j -1j; -1+1j 1+2j -1-2j] 5 3 2 [ 1+1j 1j 2j; 1 2+2j -2+2j; 1-2j -2+1j -1j; -1-1j -2-2j -1+2j] 5 4 3 [-2 1+1j 2+2j; 1-2j -1-1j 1+2j; -1-1j -1+2j 1+2j; -2-2j 1-2j 2-1j] 6 4 2 [ 1+1j -1 1+1j; -2j -1-2j -1-1j; 2j -2j 1-2j; -1+2j 2+2j -2-2j] 5 4 3 [-2+2j 2+2j 1+2j; -1+1j -1-1j 2 ; 2-2j 1j -1-2j; -2j 2 1+2j] 6 4 2 [ 2j 2+1j -2 ; 2-2j -1+2j -2-2j; -1-2j -1j -1+2j; 1 -2-1j -1-2j] 6 4 2
As the components increase in magnitude, it becomes more and more difficult to find such examples, so here are four:
[-3+2j 3j 3j; 3j -1 -3-3j; 1+3j -3+2j 3 ; 2j -1 -2+1j] 7 6 4 [-1-3j 3 -2+3j; -3 -3-1j -1+1j; -1+3j -1-2j -3-2j; -3 3+3j 2+2j] 8 6 4 [-3+1j -2+1j -1+1j; -1+3j -2 -1j; 1+2j 3j 3-2j; -2+2j -3 -2+2j] 8 4 2 [-2 1 3-2j; 1+3j 2-3j 1j; -3 -1+3j 2-1j; -2+3j 3 -3-2j] 9 4 2