diff --git a/pool/tree/pool.go b/pool/tree/pool.go
index b77d63a..ab6e98a 100644
--- a/pool/tree/pool.go
+++ b/pool/tree/pool.go
@@ -1032,6 +1032,16 @@ func (p *Pool) getNewTreeClient(ctx context.Context, node netmap.NodeInfo) (*tre
 		newTreeCl := newTreeClient(addr.URIAddr(), p.dialOptions, p.nodeDialTimeout, p.streamTimeout)
 		if err = newTreeCl.dial(ctx); err != nil {
 			p.log(zap.WarnLevel, "failed to dial tree client", zap.String("address", addr.URIAddr()), zap.Error(err))
+
+			// We have to close connection here after failed `dial()`.
+			// This is NOT necessary in object pool and regular tree pool without netmap support, because:
+			//  - object pool uses SDK object client which closes connection during `dial()` call by itself,
+			//  - regular tree pool is going to reuse connection by calling `redialIfNecessary()`.
+			// Tree pool with netmap support does not operate with background goroutine, so we have to close connection immediately.
+			if err = newTreeCl.close(); err != nil {
+				p.log(zap.WarnLevel, "failed to close recently dialed tree client", zap.String("address", addr.URIAddr()), zap.Error(err))
+			}
+
 			return false
 		}